When I first took over my tank I would have a hand full of bristle worms and other little bugs running around at nite. Now after about 12 months when I look at nite I don't see any worms, very few bugs, but a lot of tiny snails. I'm assuming they are all dead never seen any dead ones though. I know they are good for the tank should I be concerned that they are all gone? my levels have been stable through out the whole year.
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125 Gal Fresh Water
75 Gal Saltwater FOWLR