Multi-Buy 
Seachem Reef Buffer 1KG
£23.09
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Seachem Reef & Marine Water Additives
Our Bestsellers
Seachem Reef Advantage Magnesium - 600g
£12.06
Reef Advantage Magnesium is a concentrated (80,000 ppm) optimized blend of magnesium, chloride, and sulfate salts designed to restore depleted levels of magnesium with minimal impact to the ionic ratios found in natural sea water.
In Stock
Seachem Reef Buffer - 500G
£14.99
Reef Buffer™ is intended primarily for use in a reef system where the maintenance of a pH of 8.3 is often difficult.
In Stock
Seachem Reef Advantage Calcium - 500g
£13.40
Reef Advantage Calcium is a non-caustic (pH 8.3–8.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater.
In Stock
Seachem Reef Fusion 1 & 2 2L Pack
£52.00
Reef Fusion 1™ and Reef Fusion 2™ are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1™ provides calcium, while Reef Fusion 2™ provides alkalinity. When used together, the Reef Fusion™ system will maintain calcium and alkalinity levels.
In Stock
Seachem Reef Builder - 600g
£12.99
Reef Builder raises carbonate alkalinity without immediately impacting on pH. With long term use there will be a tendency to stabilize at pH 8.3. Carbonates and calcium are essential to all coral growth.
In Stock
Seachem Reef Kalkwasser - 500g
£15.99
Reef Kalkwasser is a pure calcium hydroxide with unsurpassed purity and solubility characteristics. Calcium hydroxide is used to prepare limewater (kalkwasser) solutions that will maintain calcium concentrations at natural seawater levels.
In Stock
Seachem Reef Fusion 1 & 2 500ml Pack
£20.88
Reef Fusion 1™ and Reef Fusion 2™ are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1™ provides calcium, while Reef Fusion 2™ provides alkalinity. When used together, the Reef Fusion™ system will maintain calcium and alkalinity levels.
In Stock
Seachem Reef Phytoplankton 500ml
£14.69
Reef Phytoplankton™ is a concentrated blend of green and brown marine phytoplankton designed to provide the essential fatty acids, proteins, vitamins, amino acids, with biological carotenoids for invertebrate diet.
In Stock
Seachem products have been and continue to be based on sound science. They now cover the full spectrum of aquarium requirements in freshwater, seawater, reefs, and ponds. They include buffers, conditioners, filtration media, medications, and test kits. Most of Seachem's products are totally unique and specific to Seachem.
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