Brandxn Posted July 18, 2022 Share Posted July 18, 2022 I recently came back from vacation to my 20 gallon being taken over by what I assume is green hair algae. I’ve cleaned and removed it the best I could about 3-4 weeks ago but it’s come back. I have 5 Ottos and 3 snails that don’t help clean it up. What can I add to my tank to prevent this that would be good in a 20 gallon tank? Assuming it’s hair algae. 1 Link to comment Share on other sites More sharing options...
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