I have a 10 gallon with: - 1 female Betta (my princess) - 1 catfish thing (very shy. Stays inside castle) - 1 frog (brat but skittish) - 2 snails (1 large, one small) - 3? Shrimp. They are new, I can only find 2 The shrimp and small snail are new. Before them the other four lived happily...