<much deleted> >when I do it, I try to keep Fe between 1 & 3 ppm. > >I do not consider myself an expert but I have got some really nice planted >tanks :-). > >Joanne. I hope you mean .1-.3 ppm! I don't know at what level Iron becomes toxic but I bet 1-3 ppm, at the very least, would make your fish VERY uncomfortable. -- Mark A. Thompson - rrs0062 at ibm_net