I've recently converted my 60 gallon Oceanic fish only tank to a reef tank. However it used to be a freshwater tank with a pump that had a brass fitting. It was a salt fish only for about 8 months. It holds inverts just fine and has no copper or heavy metals on any type of test, however corals hate it. I had a UV sterilizer in a 900 gph pond pump from lowes in my sump, but I recently took the UV out. I've got 80 lbs. of beautiful rock a 2.5 inch sand base but neither seem to be super live like my other tanks. The micro algae grows good on my rocks and the fish are happy. Everything is in check except for my nitrate at 80 ppm and my ammonia at 0.25 ppm. Im hitting it hard with RODI water changes and hoping for the best. It has T5 HOs enough to support the softies Ive put in it but no luck. Looking for advice.:headwallblue: