Iron concentration

<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 :-).

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