Re: Optimum iron concentration

> From: ac554 at freenet_carleton.ca (David Whittaker)
> >From: "T. Misiak" <misiak at fsu_fsufay.edu>
> >	What is the "optimum" iron concentration for good plant growth
> >that is still  safe for all the aquarium fish?  TIA.  
> 0.3 ppm iron as Fe is safe for all fish and plants as far as I know.

I recall some discussion that .1 ppm is more than adequate concentration
for plant requirements and I think it is what most folks aim for. 
I think David is suggesting that .3 would be as high as you would go
if you were not dosing everyday or at least weekly since this 
concentration will drop overtime.