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protein buildup

  1. Betta Fish Bowls, Habitats, and Accessories
    I've seen multiple posts about this odd "protein buildup" issue, but it is usually for people who don't have a filter (like my 1.5 gal, I see it there all the time) & tanks with very little current... The 5 gal I am currently cycling, I have removed the airstone & pump because it was too...