The successful SPS tank

[Treebeard]

Originally Posted by albert_dao

If your tank is six years old and your SPS is brown, the reality of it is you're probably not going to be able to break that trend without some major surgery/renovations to the system. Do you run a substrate? How deep? When's the last time you changed it out? How's your flow? Etc, etc..

I have no substrate and tons of flow. Its a 90 gallon tank with a Jebao WP-40 on one end, an RW20 on the other end, and a RW-15 on the back pointed down to move detritus off the bottom from behind the rock work.
I am also running biopellets, carbon and skimming heavy.