Who Gives A Fish Forums

Thanks for the advice, everyone. I'll try trimming it back and adjusting the flow first. I use Red Sea Coral Pro salt, and my magnesium is at 1300 ppm, so I'll bump that up a bit. Appreciate the help!

My Xenia umbellata has taken over half my 75-gallon tank. It's spreading onto my Zoanthids and even the rockwork. I run two AI Primes at 70% intensity, 8 hours a day, with weekly 10% water changes. Parameters are stable, 1.025 salinity, 78°F, 0 nitrates. How do I control it without harming the rest ...