I hav 2 severum and 2 firemouth in a 75g. My fm's r growing faster than severums. Both love live earthworms and tetrabits. I use lettuce to feed my seves bt they didn't take it.in internet I read that severum love to eat lettuce,peas,spinach. I'm worrying bout the growth of my seves. Can u guys tell me the growth rate of severum? Are they grow slowly than fm,jd & oscar?