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hydorgren peroxide

  1. General Planted Tank Discussion
    I have a 4 gallon Finnex which has black aglae on most of the plants for the past 6 months or so. I've tried doing several 3 day black outs, dosing hydrogen peroxide, extra dosign excel, and adjusting the light height and duration. It's only a 9watt light, had a 13watt light but it broke. Also...
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