Hydor Crystal 2-stage Internal Filter for Aquariums Model:900 lph 90% animal ingredients — the

90% animal ingredients — the first five ingredients are always fresh or raw

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Calcium Citrate

Hydor Crystal 2-stage Internal Filter for Aquariums Model:900 lph 90% animal ingredients — theThe internal CRYSTAL filter guarantees water filtration in two stages. The first is a mechanical filtering that captures the waste and larger particles dispersed in the water through a sponge. The second, on the other hand, can be chemical or biological depending on the filter material that will be inserted in the specific compartment: activated carbon for chemical filtering and crystalline water, ceramic materials for specific biological filtering to