Fluidized Oolitic Aragonite. As it dissolves it releases carbonate to buffer the pH, as well as feeds the filter bacteria, Calcium to increase the General hardness, and many trace elements found in ocean water. This is one of my most cherished techniques. A little flowing water and you have a win win win, good cheap and easy. My water is rain/snow melt river water so the pH and hardness are always lacking. #goldfishgarageprotip #goldfishkeepers #goldfishunion #goldfishbreeder #aquaculture #fluidizedbed #fluidizedsand

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