Skip to content

Red Sea & D-D Black Friday 2026

Filters

Red Sea 225 Micron Thin-Mesh Filter Bag

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£10.00
£10.00 - £10.00
Current price £10.00

Red Sea's replacement fine-mesh filter bags are specifically designed for the Red Sea aquariums, making them fit perfectly in the Red Sea bag holde...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£10.00
£10.00 - £10.00
Current price £10.00

Red Sea Aiptasia-X 500ml Refill

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£67.00
£67.00 - £67.00
Current price £67.00

Red Sea’s Aiptasia-X is a thick adhesive mixture which globulates on contact with the aquarium water.The solution triggers the anemone to ingest th...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£67.00
£67.00 - £67.00
Current price £67.00

Red Sea Aiptasia-X 60ml

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£19.99
£19.99 - £19.99
Current price £19.99

Red Sea’s Aiptasia-X is a thick adhesive mixture which globulates on contact with the aquarium water.The pack comes with a syringe with two differe...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£19.99
£19.99 - £19.99
Current price £19.99

Red Sea Reef Mature Starter Set

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£31.99
£31.99 - £31.99
Current price £31.99

Red Sea’s Reef Mature Starter Kit contains a complete program for the biological maturation of your marine or reef aquarium. This includes establis...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£31.99
£31.99 - £31.99
Current price £31.99

Red Sea Phosphate Test Kit

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£24.99
£24.99 - £24.99
Current price £24.99

Red Sea’s Phosphate Test Kit is a quick and reliable colorimetric test kit that can test phosphate levels in your marine aquarium to an accuracy of...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£24.99
£24.99 - £24.99
Current price £24.99
Sold out

Red Sea Magnesium Test Kit

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£22.99
£22.99 - £22.99
Current price £22.99

Red Sea’s Magnesium Test Kit provides two options for testing magnesium in your marine aquarium, with an accuracy of 100 ppm or 50 ppm. This gives ...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£22.99
£22.99 - £22.99
Current price £22.99

Red Sea Calcium Test Kit

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£22.99
£22.99 - £22.99
Current price £22.99

Red Sea’s Calcium Test Kit provides two options for testing calcium in your marine aquarium, with an accuracy of 30 ppm or 15 ppm. This gives you t...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£22.99
£22.99 - £22.99
Current price £22.99

Red Sea Nitrite/Nitrate Test Kit

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£24.99
£24.99 - £24.99
Current price £24.99

Red Sea’s Nitrite/Nitrate Test Kit is a dual complete and easy to use kit for the accurate testing of both Nitrite and Nitrate, two of the most imp...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£24.99
£24.99 - £24.99
Current price £24.99

Red Sea Ammonia Test Kit

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£22.99
£22.99 - £22.99
Current price £22.99

Red Sea’s Ammonia Test Kit is a complete and easy to use kit for the accurate testing of ammonia, one of the most important parameters in any marin...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£22.99
£22.99 - £22.99
Current price £22.99

Red Sea pH/Alkalinity Test Kit

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£22.99
£22.99 - £22.99
Current price £22.99

Red Sea’s pH/Alkalinity Test Kit is a complete and easy to use kit for the accurate testing of both pH and Alkalinity (dKH) in the marine aquarium,...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£22.99
£22.99 - £22.99
Current price £22.99

Red Sea Marine Care Multi Test Kit

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£57.99
£57.99 - £57.99
Current price £57.99

Red Sea’s Marine Care Multi Test Kit is a complete and easy to use kit for the accurate testing of the five main parameters in a marine aquarium.Th...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£57.99
£57.99 - £57.99
Current price £57.99

Red Sea Seawater Refractometer

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£52.99
£52.99 - £52.99
Current price £52.99

Red Sea’s Refractometer’s read the absolute salinity of saltwater at 25°C / 77°F (the general reef temperature), so there is no need for temperatur...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£52.99
£52.99 - £52.99
Current price £52.99

Red Sea KH Coralline Gro 500ml

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

In a marine aquarium optimized for hard corals, coralline algae will grow naturally without any special supplements. Although in a marine aquarium ...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

Red Sea Reef Energy AB+ 500ml

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£29.99
£29.99 - £29.99
Current price £29.99

The original Red Sea’s Reef Energy was split into two parts, part A and part B. Part A contained the Carbohydrates and Part B contained the Amino V...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£29.99
£29.99 - £29.99
Current price £29.99

Red Sea Reef Energy AB+ 250ml

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£19.99
£19.99 - £19.99
Current price £19.99

The original Red Sea’s Reef Energy was split into two parts, part A and part B. Part A contained the Carbohydrates and Part B contained the Amino V...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£19.99
£19.99 - £19.99
Current price £19.99

Red Sea Bioactive Elements 500ml

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

Bioactive Elements is part of the complete range of complementary major, minor and trace element complexes which together provide the needs of cora...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

Red Sea Iron+ 500ml

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

Red Sea’s Iron+ contains a complex of eight “light” metals that includes iron, manganese, nickel, cobalt, aluminium, zinc, chrome and copper.Perfec...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

Red Sea Potassium+ 500ml

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

Red Sea’s Potassium+ contains Potassium and Boron which are related to many biological processes. One of these processes is the production of red p...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

Red Sea Iodine+ 500ml

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

Red Sea’s Iodine+ Supplement contains Iodine along with other halogens that are related to many biological processes. One of these processes is the...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£23.99
£23.99 - £23.99
Current price £23.99

Red Sea Trace Colors A | B | C | D Supplement Pack

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£26.99
£26.99 - £26.99
Current price £26.99

Red Sea’s Trace Colors A |B | C | D contain the 31 trace and minor elements found in the soft tissue and skeleton of all corals. The elements in ea...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£26.99
£26.99 - £26.99
Current price £26.99

Red Sea Potassium Pro Test Kit

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£47.99
£47.99 - £47.99
Current price £47.99

Red Sea’s Potassium Pro Test Kit is a highly accurate colorimetric titration test kit for the testing of Potassium (K) in the marine aquarium. Red ...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£47.99
£47.99 - £47.99
Current price £47.99

Red Sea Iodine Pro Test Kit (I2)

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£38.99
£38.99 - £38.99
Current price £38.99

Red Sea’s Iodine Pro Test Kit is a highly accurate colorimetric titration test kit for the testing of Iodine (I2) in the marine aquarium. Red Sea’s...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£38.99
£38.99 - £38.99
Current price £38.99

Red Sea Trace Colors Pro Multi Test Kit

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£69.99
£69.99 - £69.99
Current price £69.99

Red Sea’s Trace Colours Pro Multi Test Kit contains three highly accurate kits for the testing of Iodine (I2), Potassium (K) and Iron (Fe). These t...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£69.99
£69.99 - £69.99
Current price £69.99

Red Sea NO3:PO4-X 1 Litre

Red Sea
Original price £0.00 - Original price £0.00
Original price £0.00
£33.99
£33.99 - £33.99
Current price £33.99

Unlike other methods, monitored dosing of NO3:PO4-X biologically reduces both nitrates and phosphates, while also enabling the fine control of thei...

View full details
Original price £0.00 - Original price £0.00
Original price £0.00
£33.99
£33.99 - £33.99
Current price £33.99

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare