12% Off Red Sea

Accurately measure the ammonia (NH3/NH4) in your saltwater aquarium with the advanced colorimetric test from Red Sea. 100 NH3/NH4 tests Accuracy: .2 ppm Range: 0-2 ppm Test Type: Colorimetric

The ReefRun Dual Controller offers great value as it can run both the REEFER DC Skimmer & ReefRun DC Pump (or two ReefRun DC Pumps) at the same time!  The controller is sold separately, enabling the hobbyists to purchase one controller for...

  It’s all in the balance   Red Sea’s TRACE COLORS PRO Multi Test Kit includes advanced tests for the high accuracy measurement of Iodine, Potassium and Iron. All of these elements are associated with many biological...

Red Sea Reefer XXL Bubble Trap Foam Replacement Red Sea Reefer XXL625/XXL750V2/Peninsula Bubble Trap SpongeTrap Sponge. 10-3/4" X 8-1/2" X 1-1/2". Red Sea Part # 42317.

Calcium+ Supplement Calcium and Strontium complex for balanced formation of the coral skeleton It’s all in the balance Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.All of these elements...

The NanoMat is a plug & play, fully automated, smart fleece roller filter that keeps your aquarium water crystal clear for weeks at a time. Installation Instructions for EVERY Red Sea Model - https://www.redseafish...

Red Sea Reefer 350/450 Bubble Trap Foam Replacement Red Sea Reefer 350 & 450 Bubble Trap Sponge. 16.5" X 7.5" X 1.5". Red Sea Part # 42186.

Main features of Red Sea’s Seawater Refractometer include:Directly reads the absolutesalinity ofseawaterat25°C/77 0F ( No need for seawater or temperature compensation factors)Specifically designed for the ionic content of seawater (NSW) for...

Customizable DIY Aquarium Net Cover COMES UNASSEMBLED IN A TUBE - YOU MUST CUT AND BUILD THIS YOURSELF STOCK PHOTO SHOWS WHAT CAN BE DONE WITH EXTRA PARTS SOLD SEPARATELY - THIS KIT ONLY MAKES A MAX SIZE RECTANGLE LISTED Keep your finny friends safe...

Magnesium Supplement Magnesium supplement for balanced formation of coral skeleton It’s all in the balance Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.All of these elements need to be...

Years of research and testing are behind Red Sea’s ReefLED™ smart reef lighting system. These lights have been designed to ensure optimal coral growth and dramatic coloration, while creating a gentle shimmer throughout the aquarium. Maximum...

ReefLED individual mounting arms attach firmly onto the rear wall of the tank and can be rotated to the upright position during reefscaping or other tank maintenance.  Set at the correct height above the aquarium, with the mount arm can be adjusted...

The ReefLED 50 universal mounting arm is suitable for tank widths 14"-20” (36-51cm)  with a glass thickness of 5/16”-3/8” (8-15mm) and can be rotated from side to side during reefscaping or other tank maintenance.

Red Sea’s Algae Control Pro 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...

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...

Tube Holder Tube holder with 4 quick connect tips.

79" (6.5 feet) extension cable that works with both the ReefWave 25 & 45.

Magnesium Supplement Magnesium supplement for balanced formation of coral skeleton It’s all in the balance Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.All of these elements need to be...

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

Red Sea Reefer 250 Bubble Trap Foam Replacement Red Sea Reefer 250 Bubble Trap Sponge. 14" x 6" x 1.5"  Red Sea Part # 42185. NOTE: This is only for the newer Reefer 250 Aquariums. Please measure your sponge to be sure this 10.75" X 8.75" X 1...

The ReefDose Tube Tips allow for quick and easy connection of your dosing tubing to the ReefDose Holder. They provide a clean and precisely sized dosing tips for extremely accurate dosing of reef additives.  What’s Included? 4x ReefDose Tube...

Tube Organizer Snap-open tube organizer (3 units).

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.The Magnesium Pro Test test kit enables the accurate dosing of Red Sea’s Reef...

The Red Sea Utility Basket is a product designed for use in aquariums. It is a basket or container that can be used to store various aquarium-related items, such as chemicals, food, or tools. The basket is typically made from durable, non-reactive...

ReefLED™ hanging kit including replacement ReefLED 50/90 top cover plate.

Red Sea Reefer 170 Bubble Trap Foam Replacement Red Sea Reefer 170 & Max E-170 Bubble Trap Sponge. 12" X 6" X 1.5". Red Sea Part # 42184.

Designed with hobbyists needs in mind the highly effective flow dynamics of the REEFER™ Skimmer will maintain an optimal ORP (REDOX) level of over 350mv, a level that is normally associated with ozone treatment. RSK - 600 Footprint - 10...

Reagent refill for Red Sea Nitrate Pro Test Kit. Enough reagent for 100 tests. Red Sea reagent refills make this line of test kits one of the most affordable high quality test kits available.  

This Kit was designed for current Reefer Owners.  It does not include the Magnetic ATO Sensor Mounting Bracket. The ReefATO+ is an exceptionally reliable auto top-off system that includes a highly accurate temperature monitor plus an...

Marine buffer supplement with trace elements that promote the development of Coralline Algae KH Coralline algae will grow naturally, without any special supplements in all reef systems optimized for hard corals. KH Coralline Gro is a complex of...

It’s all in the balance This combined test kit provides either 100 nitrite or 50 Nitrate and 50 Nitrite advanced colorimetric tests for marine aquariums. This kit is essential during the maturation of all marine and reef...

Measuring cylinder for ReefDose.

Net Cover Replacement Net | Item code R42088 Net (N) –  4m x 80cm /13′ x 31″ Keep your finny friends safe inside your tank with a customizable Red Sea Aquarium Net Cover. With a sleek...

Meet the new 4-part Complete Reef Care, providing hobbyists with more convenience at no extra cost, and ensuring optimal coral growth and vivid colors with only one test per week!  Our long-term research has revealed that in most reef systems...

Meet the new 4-part Complete Reef Care, providing hobbyists with more convenience at no extra cost, and ensuring optimal coral growth and vivid colors with only one test per week!  Our long-term research has revealed that in most reef systems...

R42317-V3 Bubble Trap Sponge  XXL750V3 / 3XL900 Red Sea Part # R42317-V3

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...

Phosphate Test Kit Accurate measurement of Phosphate in marine aquariums PO4 Red Sea’s colorimetric Phosphate test kit provides a quick and reliable measurement of Phosphate in your aquarium to an accuracy of 0.1ppm PO4. This test kit, in...

ReefLED individual mounting arms attach firmly onto the rear wall of the tank and can be rotated to the upright position during reefscaping or other tank maintenance.  Set at the correct height above the aquarium, the mount arm can be adjusted...

Deeper. Wider. Stronger - Red Sea’s ReefLED® series is the result of years of research into the lighting needs of corals in artificial environments. Maximum Spread - 32" X 32" Features REEF-SPEC® light...