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substrate iron


Can anyone (in addition to Rhonda Wilson and Diana Walstad) report
long-term success in a planted tank without adding chelated iron to either
the water column or the substrate?  I'm particularly interested in the
performance of soil-based substrates, substrates with laterite, or
Flourite substrates in high growth rate tanks with bright light and added
CO2.  By "long-term" I mean at least two years.

Roger Miller