My tank is already cycled. I had to take the fish out because of ich. I read that you need to keep an ammonia source going or all of the beneficial bacteria will die off because they don't have anything to feed from. I was just dropping fish food in every few days but I stopped doing that because my nitrates were climbing. I had done a great job of keeping them under 5 when i had fish. Then they got up to 20 or maybe more without fish. I still had the inverts in there though and don't feed them anything. They are all algae eaters except the anemone which I target feed a few times per week. So that is the reason for my question. If I have a 75 gallon tank with 2 red hermit crabs, 2 "lazy" hermit crabs, 2 turbo snails, 1 small ( 2 inch) star fish, 1 tuxedo urchin, and 1 anemone (3-4 inches), are they producing enough ammonia to keep the BB fed?