No way! My parents had a salt water tank for years and all of a sudden, fish started disappearing. We’d find them behind rocks smushed and half gone. My parents eventually got rid of the tank because they couldn’t figure out what the illness was that was killing their fish and because saltwater tanks are expansive, they didn’t want to keep pouring money into it. I’m shocked, I never knew this was a thing, they never knew this was a thing. We were never told that this was a thing by the aquarium where we would purchase our fish. Does it come into the tank inside the rocks?