my coralline just exploded, i actually used the product PURPLE UP for 30 days as recommended and it WORKS! The chromis were my least expensive but they are my favorite!! i might go back to the LFS and buy 5 more their only 2 bucks a pop!
maybe you would like a dwarf angelfish? something like a flame angel would contrast nice in there, just be sure to research dwarf angels first in case you dont like their behavior or something in your tank is incompatible with them.
