Andy Aquariums
NJRC Member
Nearly a year ago, I (intentionally) chemically wiped out Xenia that was taking over the tank. I have been battling getting the tank under control ever since. I finally got the nutrients under control with the help of NoPox. That cleaned up the tank but the corals and RBTAs started suffering when phosphate and nitrate went down to zero. I pulled back on the NoPox and phosphate is now .03 and nitrate is now 20ppm. As soon as I pulled back on the NoPox this ugly brown shading on the sand came back. I'm at wits end. Hopefully, I'll be installing a new 180 gallon in the next few weeks, but I need to keep this tank up and running until the 180 is cycled and I can transfer the livestock. Any ideas on how what is going on and how to get this under control? The headache this is causing is starting to make this hobby not fun and causing me to have some trepidation about the new tank.