Why hello there, I’m looking for fish to complete my 20 gal tank. Right now, if you go bythe 1 inch of fish per gallon rule, I’ve filled 15 gal+ 3 Amano shrimp... Current fish are 2 phantom Tetras, 4 Endlers Livebearers, 3 Neon Tetras and my Pleco. Any suggestions as to some final fish? Maybe a pair of some kind? Thank you!!