I have a couple cerith snails and a bunch of pods in a hang on back refugium. No fish. The cerith snails are constantly laying long white strings of eggs on the glass so i dont think this is from them. This tan colored stuff was all over my intake when i woke up today. This is the best picture i could get. Ive seen tons of cerith eggs that seem to fade & disappear after a few days.... but never see any baby ceriths. Could this be baby ceriths grouped together? Im baffled.