Might be....never think of that... I think I need to clean all of em.A thought.
You have a post with some other fish (swordtails and barbs i believe) where they may be infected with internal parasites. Do you use the same equipment to water change all your tanks?
(Not asking out of judgment, but asking to see if maybe there's a common thing that's affecting your tanks)
and nope you're not judging, also I'm sorry for calling you judging and rude in that post....
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