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- Dec 27, 2018
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Yes, all of it lol. It all happened overnight. Everything was going along fine then all of a sudden the rocks are all green, the sand is green on top and brown down below (should I try to vacuum it?) and the film on the glass. I had a clean up crew of 20 snails and they all died just before this happened.I'm not sure exactly what you are asking about. The green on the rock? The film algae?
The green on the rock looks like a coralline algae to me. Film algae is a sign of a healthy tank. Most people need to clean the glass of their aquariums every few days. My guess is that you didn't see this earlier because you haven't added much to your system.
It's probably time to add a CuC which will help with some of the film algae but you can expect to have stuff to clean the glass and have that "crud" along the sand line for as long as you run the tank.