So I currently have a 4 ft tropical fish tank. In there, I have a few plecos (all are rescues and none have grown in the roughly 4 years they've been alive so no chance of growing now!), I have two medium angelfish, a rainbow shark (2 inches maybe?), a few glowlights and neons, and some black widow tetras. I've had tanks for roughly 6 years and recently lost my favourite angelfish. I have done all water tests and all are good, but was wondering what fish I could add to my tank? I know a few ideas but didn't know if there were any others I maybe haven't thought of?