How old are your bulbs? As your bulbs age, they produce more red light, which in turn algae thrives even more so on.
I used Poly Ox before, and it never came back
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28g Nano Cube drilled with 13g sump in stock stand. Vertex IN80 Skimmer, Phosban 150 Reactor, Apex Controller, DIY LED with stock hood, dimmable
Established March 2006
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