They look exactly like limpets-see link->http://www.caudata.org/cc/articles/Tank_critters.shtml They are the ones in the picture on the left. They are all over my tank, and are climbing up out of the water-stuck to the sides of the tank, and all over the rocks. They feel hard on the outside, and are almost super-glued to the sides of the tank. We took all of our fish out of one 30gal tank, and into this other one. The former tank-even though it has been empty for about a month now-also has these things in there-stuck to the sides of the tank. I can’t tell if they are alive or dead now…but I have looked up fish lice, and then came across this photo-which is exactly what they look like. I am still not convinced-alot of things could look like those right? I just want to know exactly what they are. Alot of fish have been dying off recently too, but I don’t see any of these things on the fish.
Most of them seem to like staying up out of the water(closer to the light maybe?) We have pushed them down below the water line-and they move back up, out of the water. They have a hard outer shell. (we switched tanks because of a leak-we didn’t know the tank had these things in there-the empty tank still has some water in the gravel as well).
