I just went to look at my fish tank and I saw a tiny brown worm about 1 centimeter long crawling on the glass. Before I could get my camera it disappeared. Does anyone know what this is? Could it hurt my fish?
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That's crazyIf they can find food and a place to hide anything is possible. I had a loach hide for a couple of years in my 55 gallon tank and did not find him until I was cleaning out the gravel.