ecosystem

My snails were doing naughty things. My acro are all responding well. So proud tonight to watch things thriving.

Hello, I have an established ecosystem in a half circle 35 gallon salt water tank. I have a 4 level canister filter. I HAD 5 hermit crabs , 4 decent size and one smaller than your fingernail (all with shells) I entered my 5th grade classroom today to find remains of a molt but no crab. What...