I just bought shrimp yesterday and they died today. I've been dosing the CSM+B by the PMDD method, and long ago realized that there isn't enough iron in comparison to the other trace elements. I suppose it finally mattered and the copper built up killing the shrimp.
Rex, where can I get this 14% iron chelate? I know Greg sells a 10%er for $17/pound. Not necessarily cheap, and you said yours was cheap. I might be able to do the math too.