I have a single betta and a few pond snails in a 10 gallon tank. The setup is about a month and a half old, and today, I noticed a small white worm, possibly with many legs but too small to see (the entire worm was maybe 4-5 mm long) wriggling against the glass.
What should I be watching for, to see what this might be? (And why hasn't the betta eaten him, anyway?
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What should I be watching for, to see what this might be? (And why hasn't the betta eaten him, anyway?