I have a Green Severum thats about 4 inches long. She has been digging a pit by a big rock and has now laid eggs on this rock. Her tankmates are 3 slightly smaller Firemouths, a Silver Tip Shark, and a pleco. Could she possibly breed with the firemouths? Should I get her another Severum? Also, they are in a 55 gallon aquarium. Thanks for any help.