I put a tiny .75" clown in with my 3" gsm. No breeder box or anything. She chased and nipped at him for all of about 5 minutes, then largely ignored him unless he got close the gbta and rbta. Even then, she would only chase him away without biting. It took a couple days before she let him host. I figure if she hasn't killed or injured him yet, she's not going to. The only aggresive behavior I've observed is her swimming up fast to him, and he does the submissive seizure. I'm thinking I got lucky pairing them, after reading on here iwas a bundle of nerves about attempting a pair.