Whats the cemical formula for epsom salts? Should one add it to a planted Discus tank and if so, what does it do (is good for)? If one adds MgSO4 and / or K2SO4, how do one test that the levels in the tank is ok? Is there special test kits for it somewhere? Greger --- StripMime Report -- processed MIME parts --- multipart/alternative text/html ---