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hard algae
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  1. Algae
    :help::help::help: i have a 15 gallon tank and i have 2 60W bulbs and i have had it for about 2 months, the algae was pretty good, but then in the past week it has gotten out of control, it is soft on the outside, but once you scrape that away, you get to this stuff that is like cardboard, its...
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