Natural coral rubble. Grain size 20-25mm. Sold by the kilo. In addition to marine aquariums, it is suitable for freshwater aquariums to raise KH.

ZEOmag is a pure magnesium granulate. Mix with the coral gravel media at a rate of 10-30% and fill into the calcium reactor. Coarse grain of 6-12 mm. Increases magnesium without chloride sulphate Recommended in...

Triton CaRx Media 10 kg is a very pure calcium Reactor medium TRITON CaRx is a very pure calcium Reactor medium for use in professional care systems such as the TRITON method. The medium was...

ROWAlith W - large media of 9-15mm grain size ideal for larger size calcium reactors, due to larger grain size it will resist tracking of water through the media often experienced when running small grain sizes in larger non fluidised reactors... Rowalith...

Reborn® coarse aragonite media for calcium reactors is composed of fossil Skeletons of Reef building Corals Sustainably harvested from Pristine sites in the Western Pacific. When dissolved, ReBorn replenishes calcium and carbonate alkalinity, strontium and...