The issue is one of inducement.<snip>
I hope I'm correct in interpreting this to mean: If the healthy, well-nourished plants consume all the ammonium ion, NH4+, that is produced, then there is nothing to signal the algae spores to grow. The old algae dies off, the new spores don't grow, and you are left with a tank with no *visible* algae.Spores need NH4 to get going in many species of algae. Healthy plants = very low NH4.
John T. Fitch www.fitchfamily.com/aquarium.html
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