Does Sand Have High Cec Barr Report Forum Aquarium
Sep 14, 2010 As far as sand I like pool sand, good structure, rounded, few sharp edges, generally cheap. For the smarter than average, good looking, patient aquarium keeper 3 inches (7.6 cm) of pool sand can be a marvelous multi decade filter highly enriched substrate. I am not familiar with 3M sand, aside from some abrasives.The sand should be sharp, not rounded, so it interlocks together well. Should be around 100 150 mesh or so. The binder for green sand can be bentonite (about 5 ) or fireclay (around 10 ) but must be very fine, 325 mesh or finer. If there's a pottery supply place nearby, the sand ( silica ) and clay can be purchased inexpensively in 50 lb sacks.