I got a 10 gal tank with 5 ember tetras, a female betta and a bristlenose pleco. Can i add more tetras or is this one at perfect? It also has some moss, moss balls and a banana plant. My big 30 gal has 2 betta females who seem to get along. And 6 harlequin rasboras, java fern, a dwarf water lily and some crypts What else should i add? I also have a betta in a 5 gal but she just has snail friends.