Yeah i agree it some sort of shelled creature haha.Freshwater limpet?
Maybe if you have another tank you could feed them to other fish such as dwarf puffers? But if you don’t you could just lower feeding amounts so they don’t have anything to eat, or manually remove them which would be a pain.You guys I'd say are spot on. Looks very likely a limpet. I'd there any way of getting rid of them? I've had them for several months now, a month or 2 after my tank was set up.