1 ppm of iron may be high for fish. >My substrate is fluorite, my well water is slightly alkaline >(7.5-8pH), GH of 11 with roughly 1ppm of iron, so I think I'm set there. -- Raj, vu2zap Bengaluru, South India. _______________________________________________ Aquatic-Plants mailing list Aquatic-Plants at actwin_com http://sable.actwin.com/mailman/listinfo/aquatic-plants