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In sea water
and other suspension-feeding marine invertebrates
you are asking for disaster and will likely kill your fish
already functioning tanks
TGR PPS-03 (Processed Pumice Stones) others In sea waterLightweight and very porous biomedia for benedicial bacteria. Economical, versatile and easy to use. Inert and can be used for all types of aquarium systems. The classic biomedia of TGR. Can be placed in media bags or baskets, canister filters, hang on back filters or overhead trickle filters. Best used with TGR Reduce for nutrient management in reef aquariums. Muriatic acid washed. Recommended usage: Place enough pumice in a media bag or preferably a