I have an 80 gal newly established FO tank with a scopas tang, henny, and 2 perculas. I would like to add something more colorful. Any suggestions? Also, should I add more rock and/or coral(fake) when I introduce another fish? My tang is very territorial and has claimed all 3 caves that I provided! Also, I would like a "tank cleaner", snails, etc. but without LR, are they OK? Thanks!