I think I know what these little bugs are.
I've had them in my tanks, and I've seen them at both pet stores I've worked in. Often haning out on the lids to aquariums where it's nice and wet.
They do not harm anything. They are just kind of irritating for the keeper. Small fish will eat them, stuff like that.
I wouldn't take it so far as to use chemicals on them.
I am highly prized for my meat. :eb: