I have a pike cichlid and green terror. I was wondering if there were any tankmates that wont get killed or kill them. The pike is 5"-6" and the terror 4"-5". I want an animal that is small. like -2" like a crayfish or something. a snail. BUT snails breed like crazy. and i dont want it to eat plants. cause i have live plants. thanks. sorry for being picky.