Originally Posted by Kylecva
Yes I got all of my rock out of an already established tank. The mushroom and the hermits were on those when we moved them.
With the hermit crabs and mushroom corals in there you definitely don't want to add any ammonia or you will just end up killing them. If the tank you got the rock from was already established and cycled then congratulations! You have a fully cycled tank!
I would start out by checking the ammonia, nitrite, and nitrate to see how they are and then you can look at adding your first fish. As for the stocking you want, I wouldn't put more than 4 fish into a 25g tank and some people will even argue that is getting to be a little much. The 2 Ocellaris, firefish or gramma, and the goby should be a good mixture for a tank with some good colors and movement.