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Fe limiting for green dust/green spot algae

Tom Wood wrote:

"I'm dosing just K2SO4 now to see if an Fe limited tank will do better
with green spot/dust algae. (N and P via fish food) "

I have been trying this too, for about 3 weeks. I did a 4 day blackout a 
week ago, and of course all the green algaes went away. The green dust has 
returned, but not so strongly as before the blackout - but I know the 
blackout slows it down. I suspect that Fe limiting isn't going to do it. I 
am dosing N, P, and K, and adding baking soda and Seachem Equilibrium.


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