Collection: Water Care

Red Sea Seawater Refractometer

High Accuracy Seawater Refractometer

Red Sea’s Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25°C.

Most refractometers used within the aquarium hobby are not specifically designed for reef aquariums and use an algorithm for the measurement of brine (NaCl – rather than seawater) and at a temperature of 15oC/59 0F rather than 25oC/77 0F. Thus, a measurement deviation of up to 1.5ppt is possible, which can have a significant adverse effect on coral growth and coloration.

Main features of Red Sea’s Seawater Refractometer include:

• Directly reads the absolute salinity of seawater at 25°C/77 0F ( No need for seawater or temperature compensation factors)
• Specifically designed for the ionic content of seawater (NSW) for more accurate salinity measurement (industry standard refractometers are calibrated for salt brine ).
• Calibrated for seawater (NSW) at 25oC/77oF, the normal temperature range for reef aquariums
• (most standard refractometers are calibrated at 15oC/59oF ).
• Easier to read, higher resolution display, focussed to the relevant range for reef aquariums of up to 40ppt
• Includes Integrated Automatic Temperature Compensation (ATC) for accurate measurement at standard ambient temperature.

Red Sea’s Refractometer display

The PPT scale on Red Sea’s Seawater refractometer is calculated using an algorithm for seawater and therefore will give a reading of the Absolute Salinity of seawater.

The PPT scale on regular salinity refractometers are calculated using an algorithm for Brine. Using a Brine refractometer for Seawater will give an error of approximately 1.5ppt in the salinity reading.

About Salinity

Salinity is a general term describing the concentration of salt in water. However, solutions of different type of salts have different refractive indexes.

Brine is a solution of Sodium Chloride (table salt) that contains 2 chemical elements.

Seawater contains approximately 70 chemical elements that include Calcium, Magnesium, Potassium etc. in addition to the Sodium Chloride.

Seawater and Brine of the same salinity (i.e. the same weight of salt/liter) have different refractive indexes and will give different salinity readings if measured on the same refractometer.

Refraction & refractive index

• All transparent materials such as liquids refract (distort) light.
• All transparent materials refract light differently and have what is called a “refractive index” which means how much a particular material distorts light.
• Different concentrations of the same liquid have different refractive indexes.
• The scale of a refractometer is calculated by using a mathematical algorithm that relates the measured refraction to its concentration for a specific liquid.

Refractive index and temperature

• The refractive index of liquids change with temperature and therefore has a major effect on measuring salinity with a refractometer.
• The algorithm for defining the PPT (and S.G.) scale for a refractometer is calculated for a specific temperature.

PPT readings from refractometers that are not calibrated for reef aquariums (i.e. 25oC) need to be adjusted according to a conversion table to give the actual PPT at the aquarium temperature. This is often a cause for misinterpretation of refractometer readings.

For example, using a seawater refractometer calibrated at 20oC will give a PPT reading that is approximately 1-1.5ppt lower than the absolute salinity of the same water sample at the normal aquarium temperature of 25oC.

Therefore, Red Sea’s Seawater Refractometer calibrated at 25°C/77 0F directly reads the absolute salinity of seawater with no need for temperature compensation factor)

ATC – Automatic temperature compensation

Temperature is probably the biggest cause of wrong readings with a refractometer. Calibration and testing of water samples should be done after the refractometer and water sample have equalised at the correct temperature.

Automatic temperature compensation (ATC) compensates for a few degrees of difference between the ambient temperature and the calibrated temperature of the refractometer. Larger temperature variations will give an error of approximately 1.0ppt in the salinity reading.

ATC does not adjust the PPT reading of a refractometer to the temperature of the aquarium!

Red Sea Marine Care Test Kit - Multi Kit

Marine Care Test Kit

• Easy-to-use tests for the accurate monitoring of all of the important parameters
• during the biological maturation of marine and reef aquariums
• NH3/NH4 | NO3 | NO2 | pH | KH

Red Sea Marine Care Test Kit is Complete multi-test pack including all of the tests necessary to monitor the biological maturation of new systems and for the ongoing maintenance and algae management of fish-only aquariums.

The Marine Care Test Kit includes the tests pH, KH, ammonia, nitrate and nitrite in a durable, chemical-resistant plastic box.

Red Sea Marine Care Reef Mature Pro Kit

Reef Mature Pro Kit

A complete biological maturation for reef aquariums, providing nitrification, nitrate and phosphate reduction

• Nitro Bac 100ml
• Bacto-Start 100ml
• NO3:PO4-X 100ml
• KH Coralline Gro 100ml

Red Sea’s Reef Mature Pro Kit provides a complete program for the biological maturation of your reef aquarium, establishing full nitrification plus nitrate and phosphate reduction in a few weeks.

By using Red Sea’s Complete Marine Care Test Kit, you can monitor all essential water parameters during maturation.

Red Sea’s Reef Mature Pro Kit includes:

Nitro Bac:

A concentrated blend of nitrifying and de-nitrifying bacteria spores to seed the live rocks, substrate and the bio-media in a new tank.

Bacto-Start

A balanced blend of nitrogen and phosphorus components that simulate the natural waste products of an active aquarium, enabling a controlled development of the aerobic and anoxic bacteria.

NO3: PO4-X

A unique complex of carbons and other organic bonded elements that are used by anoxic bacteria for the accurate control of algae nutrient (nitrate and phosphate) levels. Prevents nuisance algae and enables control of zooxanthellae for optimum coral growth and coloration

KH Coralline Gro

A concentrated marine buffer complex of carbonate buffers & potassium, fortified with the specific minor and trace elements,such as iron, that promote the growth of coralline algae and other beneficial micro-fauna.

Red Sea’s Reef Mature Pro Kit- Complete biological maturation supplement kit for aquarium systems up to 250 litres

Concentration:

• Treats 250 litres

package size/volume:

• 4 X 100ml

Red Sea pH Alkalinity Test Kit - 100/55 Tests

pH / Alkalinity Test Kit

Accurate measurement of pH & KH in marine aquariums

• pH | KH

Red Sea pH / Alkalinity Test Kit – A dual test kit includes an accurate (1 dkH/0.36 meq/l) titration test for KH and a colorimetric test for pH for monitoring these essential parameters in all marine aquariums.

The Red Sea’s KH-Alkalinity test kit enables accurate dosing of Red Sea’s KH Coralline Gro or Reef Foundation B Buffer Supplements in fish-only systems.

Red Sea Nitrite Nitrate Test Kit - 100/50 Tests

Nitrate / Nitrite Test Kit

Accurate measurement of nitrite and nitrate in marine aquariums

• NO3 | NO2

This combined test kit provides either 150 nitrite or 100 nitrate plus 50 nitrite advanced colorimetric tests for marine aquariums.

This kit is essential during the maturation of all marine and reef aquariums and is suitable for ongoing algae management with Red Sea’s NO3: PO4-X in fish-only systems.

Specifications:

• Test: NO₂
• Accuracy : 0.05 ppm
• Range: 0-1 ppm
• Test Type: Colorimetric
• Tests: 50

• Test: NO₃
• Accuracy: 2 ppm
• Range: 0-250 ppm
• Test Type: Colorimetric
• Tests: 50

Red Sea Phosphate Testing Kit - 100 tests. 

Red Sea’s colorimetric Phosphate Marine Test kit provides a quick and reliable measurement of Phosphate in your aquarium to an accuracy of 0.1ppm PO₄.
This test kit, in conjunction with Red Sea’s Nitrite/Nitrate test kit, enables dosing of NO₃: PO₄– X (Biological Nitrate and Phosphate reducer)

Kit includes:

• Reagent A 50ml
• Reagent B 10ml
• 10ml syringe
• Glass vial
• User manual
• Colour card

Specifications:

Phosphate Pro Test Kit Specifications:

• Test type: Colorimetric
• Test range: 0-17 ppm of PO4
• Accuracy: 0.01 ppm of PO4

Red Sea’s Phosphate Pro Test kit includes a durable, chemical resistant plastic case and analytical grade glass vials.


Package size/volume:

• 100 tests

Red Sea’s user-friendly Calcium Marine Test Kit provides a quick and reliable measurement of Calcium in your aquarium to an accuracy of either 15ppm or 30ppm according to your needs.
 
Kit includes easy to follow graphic instructions and conversion tables for immediate interpretation of results.

Kit includes:

• Reagent A 25ml
• Reagent B 20 gr
• Reagent C 50ml
• 5ml syringe
• Glass vial
• User manual
• Color card
• Spoon

BENEFITS:

• 38-75 Tests Per Kit
• Accuracy: 15-30ppm

Red Sea’s user-friendly Magnesium titration test provides a quick and reliable measurement of Magnesium in your aquarium to an accuracy of either 50ppm or 100ppm according to your needs.

The kit includes easy to follow graphic instructions and conversion tables for immediate interpretation of results.

Kit includes:

• Reagent A 15ml
• Reagent B 15ml
• Reagent C 50ml
• 5ml syringe
• Glass vial
• User manual
• Colour card

BENEFITS:

• 38-75 Tests Per Kit
• Accuracy: 50-100ppm
• Measures the level of magnesium in your reef aquarium
  

Red Sea Ammonia NH3/NH4 Test Kit - 100 Tests

Accurate measurement of ammonia in marine aquariums

• NH3 | NH4

Red Sea Ammonia Test Kit is an advanced colorimetric test measuring the total ammonia (NH3/NH4) in marine aquariums to an accuracy of 0.2 ppm.

This simple to use test kit is essential during the initial stage of the biological maturation of all marine and reef aquariums.

Red Sea Ammonia Test Kit Includes 100 tests.

Specifications:

Red Sea Calcium Pro Test Kit (75 Tests)

BENEFITS:

• 75 Tests Per Kit
• Accuracy: 5ppm

Measures the level of calcium in your reef aquarium.

Kit includes durable, chemical resistant plastic case & analytical grade glass vials.

Red Sea’s Calcium Pro Test Kit is an advanced calcium titration test, measuring the level of calcium in your reef aquarium to an exceptionally high accuracy of 5 ppm.

This test kit enables the accurate dosing of Red Sea’s Reef Foundation A (calcium/strontium) and Coral Colours supplements, which are part of the complete Red Sea Reef Care Program.

Red Sea KH Alkalinity Pro Test Kit (75 Tests)

• 75 Tests Per Kit
• Accuracy: 0.05 meq/l (0.14 dKH) 

Measures the level of buffers in your reef aquarium.

Kit includes durable, chemical resistant plastic case & analytical grade glass vials.

Red Sea’s KH/Alkalinity Pro Test Kit is an advanced titration test, measuring the level of buffers in your reef aquarium to an exceptionally high accuracy of 0.05 meq/l (0.14 dKH).

This test kit enables the accurate dosing of Red Sea’s Reef Foundation B supplement (buffer) which is part of the complete Red Sea Reef Care Program.

Red Sea Mg Magnesium Pro Test Kit (100 Tests).

BENEFITS:

• 100 Tests Per Kit
• Accuracy: 20 ppm
• Measures the level of magnesium in your reef aquarium
• Kit includes durable, chemical resistant plastic case & analytical grade glass vials.

Red Sea’s Magnesium Pro Test Kit is an advanced titration test, measuring the level of magnesium in your reef aquarium to an exceptionally high accuracy of 20 ppm.

This test kit enables the accurate dosing of Red Sea’s Reef Foundation C supplement (magnesium) which is part of the complete Red Sea Reef Care Program.

Red Sea NO3 Nitrate Pro Test Kit (100 Tests)

BENEFITS:

• 100 Tests Per Kit
• Test range: 0-64 ppm of NO3
• Accuracy: 0.125 ppm of NO3

Measures the level of Nitrates in your reef aquarium

Kit includes durable, chemical resistant plastic case & analytical grade glass vials.

Red Sea’s Nitrate Pro Test Kit is an advanced colorimetric test with comparator, measuring the level of nitrate in your reef aquarium to an exceptionally high accuracy of 0.12ppm NO3.

This test kit, when used in conjunction with the Phosphate Pro Kit, enables accurate dosing of Red Sea’s NO3: PO4- X (biological nitrate and phosphate reducer) which is part of the complete Red Sea Reef Care Program.

Red Sea Phosphate Pro Testing Kit - 100 tests. Red Sea’s Phosphate Pro Test Kit is an advanced colorimetric test with comparator, measuring the level of phosphate in your reef aquarium to an exceptionally high accuracy of 0.02ppm PO4.

Phosphate Pro Test Kit

• Exceptionally high accuracy colorimetric comparator tests
• for Phosphate measurement
• PO4

Red Sea’s Phosphate Pro Test Kit is an advanced colorimetric test with comparator, measuring the level of phosphate in your reef aquarium to an exceptionally high accuracy of 0.02ppm PO4.

Phosphate Pro Test Kit, when used in conjunction with the Nitrate Pro Test Kit, enables accurate dosing of Red Sea’s NO3:PO4- X (Biological Nitrate and Phosphate reducer) which is part of the complete Red Sea Reef Care Program.

Red Sea Reef Foundation Pro Test Kit Ca, Kh, Mg

Red Sea's Reef Foundation Kit includes high accuracy titration tests for the accurate measurement of the elements Calcium, Magnesium & Allkalinity(KH) which are the basic foundation elements of coral skeletons.

All of these elements need to be available in balanced proportions for coral health and growth.

This test kit enables accurate dosing of the Reef Foundation Supplements, which are part of the complete Red Sea Reef Care Program.

Red Sea Algae Control Management Pro Multi Testing Kit NO3 PO4. The nitrate & phosphate tests are essential for the accurate dosing of Red Sea’s NO3: PO4- X (biological nitrate & phosphate reducer) which is part of the complete Red Sea Reef Care Program.

Algae Management Multi Test Kit

• Exceptionally high accuracy colorimetric comparator tests
• for the measurement of nitrate and phosphate
• NO3 | PO4

Red Sea’s Algae Control Kit includes high accuracy colorimetric comparator tests for the exceptionally high accuracy measurement of nitrate and phosphate.

The nitrate & phosphate tests are essential for the accurate dosing of Red Sea’s NO3: PO4- X (biological nitrate & phosphate reducer) which is part of the complete Red Sea Reef Care Program.

Specifications:

Algae Management Multi Test Kit Specifications:

Red Sea Coral Colours Pro Multi Test Kit

Coral Colours Pro Test Kit

Advanced Tests Kit for the high accuracy measurement of iodine, potassium and iron elements.

• I2
• K
• Fe

Red Sea’s Coral Colours Pro Test Kit includes advanced tests for the high accuracy measurement of iodine, potassium and iron.

All of these elements are associated with many biological functions, including coral pigmentation.

The Coral Colours Pro Test Kit enables accurate dosing of three of the Coral Colours Supplements range, which are part of the compete Red Sea Reef Care Program.

Red Sea’s Coral Colours Pro Test Kit Specifications:

Complete 4-part
Supplement Program

Optimal coral growth & coloration in non-refugium systems. Simplify your  supplementing routine at no extra cost!

Simple. Safe. Successful.

The new Complete Reef Care is a proven, 4-part program that ensures optimal coral growth and colouration, by replenishing the water with all 36 Major, Minor and trace elements that get used up regularly by the reef (including the Alkalinity components). 

Good News!

If you do not have a refugium and are using the 7-part Foundation and Trace colors program, your life just got easier, as you can now seamlessly move to the 4-part Complete Reef Care.

Fixed Ratio

Our long-term research has revealed that in reef systems without a refugium, the 36 Major, Minor and Trace elements and even the Alkalinity components are used up in a relatively fixed ratio, enabling you to supplement all element groups according to a measured Calcium uptake.

Simply by dosing Calcium

Since Calcium is the key indicator to coral growth, the 4-part program revolves around a single weekly measurement of Calcium, which determines the dosages of all 4 parts.

And here's how it works:

The four parts are formulated in an easy-to-implement ratio. So, if Part-1, which includes Calcium, is 5ml, Part-2 with be 10ml and Parts 3 and 4 with both be 2.5ml.

Simply set the initial recommended dosages and adjust them as the calcium uptake changes over time.

And once you connect the 4 parts to your ReefDose, your supplement routine will truly becomes as easy as you could ask for. When you adjust the daily dose of Part 1, ReefDose will automatically adjust the dosages of parts 2-4!

To top it off, the four parts are provided in the same ratio that they are used up, so you finish all four parts at the same time, which of course, is super convenient.

The Red Sea App allows for: 

• Recommended Daily Dose
• Manual Dose
• Dosing Data
• Supplement Volume Monitor
• Dosing Calculator
• Calcium Test Log

Complete Reef Care Packages

Available in 3 sizes, offering great value to any system, from a small mixed reef to a large dominant SPS tank.

Small Pack - Ideal for systems up to 150l

Medium Pack - Ideal for systems up to 300l

Large Pack - Ideal for systems up to 600l

• Part 1 - Calcium & Magnesium
• Part2 - KH/Alkalinity & pH Stabiliser
• Part 3 - Iodine & Potassium
• Part 4 - Iron & Bioactive Elements

For More information on the Complete Reef Care and more visit the Red Sea Website.

Red Sea Reef Foundation A - Ca/Sr Supplement

Calcium & Strontium complex for balanced formation of Coral Skeleton

Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.

All of these elements need to be available in balanced proportions for coral health and growth.

Reef Foundation A contains blended salts of Calcium and Strontium in the ratio required by corals and is part of Red Sea's complete Reef Care program.

For best results dose according to a measured uptake of Calcium and in conjunction with Reef Foundation B and C.

Contains

• Calcium Chloride

Dosage:- 

• 1ml per 100 litres to raise 2ppm of Calcium

Red Sea Reef Foundation B - Buffer Supplement 

Carbonate & buffer complex for balanced formation of Coral Skeleton

Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.

All of these elements need to be available in balanced proportions for coral health and growth. Reef Foundation B is a complex of carbonate and other buffers present in seawater that maintain proper alkalinity and pH, and is part of Red Sea's complete Reef Care program.

For best results dose according to a measured drop of alkalinity and in conjunction with Reef Foundation A and C.

Sodium Carbonate and Potassium Carbonate

1ml per 100l will raise 0.1dKh (0.036 meq/l) Alkalinity

Red Sea Reef Foundation C Mg Supplement 

Calcium & Strontium complex for balanced formation of Coral Skeleton

• Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.
• All of these elements need to be available in balanced proportions for coral health and growth.
• Reef Foundation C contains blended salts of Magnesium and is part of Red Sea's complete Reef Care program.

For best results dose according to a measured uptake of Magnesium and in conjunction with Reef Foundation A and B.

1ml per 100 litres to raise 1ppm of Magnesium

Red Sea Reef Colours A - Halogens (I2, BR2, F2) Supplement

lodine/Halogen complex that promote the Pink colours in coral.

Coral Colours A Supplement is part of the complete range of complementary major, minor & trace element complexes which together provide the needs of corals.

Coral Colours A Supplement contains lodine and other halogens that are associated with many biological processes, one of them being the production of the pink pigments in the soft tissue of corals.

To ensure coral health, the ppm level of these elements must be maintained within a narrow band and therefore should only be dosed according to a measured requirement of the aquarium.

For optimal results, dose according to a measured uptake of lodine using Red Sea's lodine Pro test kit. An easier alternative is to dose in proportion to the dosing of Red Sea's Foundation A(Calcium/Strontium) Supplement.

For best results in displaying coral colours use Red Sea's NO3-PO4-X.

Dosage: 1ml per 100 litres to raise 0.03ppm of Iodine

Red Sea Reef Colours B - Potassium Supplement 500ml

Potassium complex that promote the Red colours in coral

Coral Colours B Supplement is part of the complete range of complementary major, minor & trace element complexes which together provide the needs of corals.

Coral Colours B Supplement contains Potassium and Boron that are associated with many biological processes, one of them being the production of the red pigments in the soft tissue of corals.

To ensure coral health, the ppm level of these elements must be maintained within a narrow band and therefore should only be dosed according to a measured requirement of the aquarium.

For optimal results, dose according to a measured uptake of Potassium using Red Sea's Potassium Pro test kit. An easier alternative is to dose in proportion to the dosing of Red Sea's Foundation A (Calcium/Strontium) Supplement.

For best results in displaying coral colours use Red Sea's NO3:PO4-X.

Dosage: 1ml per 100 litres to raise 1.75ppm of Potassium

Red Sea Coral Colours C - Fe Iron Supplement

Iron and complementary trace element complex that promote the Green colours in corals

Coral Colours C Supplement is part of the complete range of complementary major, minor trace element complexes which together provide the needs of corals.

Coral Colours C Supplement contains Iron, Manganese and other trace elements that are associated with many biological processes, one of them being the production of the green/yellow pigments in the soft tissue of corals.

To ensure coral health, the ppm level of these elements must be maintained within a narrow band and therefore should only be dosed according to a measured requirement of the aquarium.

For optimal results, dose according to a measured uptake of Iron using Red Sea's Iron Pro test kit.

An easier alternative is to dose in proportion to the dosing of Red Sea's Foundation A (Calcium/Strontium) Supplement.

For best results in displaying coral colours use Red Sea's NO3:PO4-X.

Dosage: 1ml per 100 litres to raise 0.02ppm of Iron