I have a 92 gallon planted tank with 5 neon tetras, 4 glass catfish, 4 scissortail rasboras, 1 panda cory 2 spotted cory, one otto cat, 3 angels 5 serape tetras, 4 zebra dannio, and 5 glow tetras. I have a corner sponge filter and a fluval 406.I have 5 airstones. I want to get an elephant nose. Would he be compatable? My serape are a little nippy should I get more?