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>From: "Elliot Royce" <e_royce at msn_com>
>I've added 10ml of powder to a 60 gal tank, providing an iron concentration of
>1mg/l, which my Sera test kit indicates is optimum. The pH and hardness seem
>fine, and the fish seem OK. The only problem is that my tank has turned red.
Try 1 ml.
0.1 mg/l (ppm) is a better target concentration.
Neil Frank Aquatic Gardeners Association Raleigh, NC
The Aquatic Gardener - journal of the AGA - now in its seventh year!!