I have five adult Assassins in three tanks. Just found four small Assassins in one tank. I have growing pest snail populations in all my tanks. I like the pest snails to a point and am hoping to manage balance between my Assassins and pest snails.
I think I am a long way away from too many Assassins but if I get to the point that they are close to wiping out my pest snails, I am planning to either:
1) Concentrate them in one tank and feed them carnivore pellets so that I have an Assassin army that can be deployed to manage excess pests in any tank
2) Give excess Assassins to LFS