I have one assassin snail with an uncontrollable appetite. I dropped 6 bladder snails in his tank and they were all eaten within 3 days, possibly 2 days. So now I have obtained about a dozen more and am breeding them separately for now. How many should I have before adding to the tank so that sammi the assassin will not eat them all. I’m hoping for population control not eradication. I have a 10 gallon with Java broadleaf and windelov and Anubias. Also 4 neons and 4 embers. 3 mommy fish laid eggs that were all eaten recently. Parameters perfect and holds steady.