Hello There-my sump has developed some sort of interesting little creature on the sides. They look like flat, whiteish, circular type and have what seems to be channels running through them with one opening at the edge of the circle where there is some firm looking tentacles. They almost look like blotches of lotion but with a network of tunnels. They are very thin and somewhat transparent. The sizes range from a dime sized to a quarter size. I am wondering if anyone may know what they are and if their appearance is a sign that things are good or bad. Thanks for any insight you may have.