Again, I'm sorry for so many questions, but there is a wealth of knowledge on here! Was thinking about adding some snails once I get things established again. For what reason? Was thinking they would help with some of the surface algae and maybe some of the muck. But now I don't know. I do know carpet algae is good, and apparently some muck is good too. Any opinions?? Again I'm sorry about so many posts with so many questions.