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About the only element I've added, in appropriate/reasonable amounts mind you, to the water column which has noticeably increased algae growth is iron.
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That's interesting, Bob. Ever since I've been adding more iron, I've been noticing a decrease in algae.
Plants seem to grow differently in different tanks. Some tanks seem to need more iron than others to get going. I just dial in my numbers for PO4 and NO3 for each tank, but the iron/trace dosing takes a while to play with and fine tune for each one.
Carlos