Continuum Aquatics Bact Rox Nitrazex – Small Porous Filtration Media to Remove Nitrates, Nitrite, and Ammonia in Reefs, Marine Saltwater and Freshwater Aquariums, 250-ml

The rocks have a sand texture to it. Like sandpaper. Im thinking if i break the rocks into smaller pieces I can get even more surface area.

It is really necessary for the shrimp to molt. I recommend