Small white worms everywhere in a friends 40gal, not sure how to get rid of them

[Isadora]

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[Mebbid]

Wow, that's pretty bad. What fish are in the tank?

[Gillie]

Oh wow, someone needs to keep up on their maintenance, I see many water changes in your friend's future. The problem is likely caused buy lack of cleaning the substrate and the planaria population has exploded. Several large water changes with a thorough gravel vac should do the trick, but they need to keep it clean to control the buggers.

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[Chesmok]

Yeah those are planaria. Over feeding fuels them. Cutback on food and do more water changes. Birth eyre harmless though. Just ugly


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[gzeiger]

I think they're cute. I'd keep them. But it is a sign that the tank needs cleaning.