Over the last month and a half or so my SPS have been losing color in my 38 gallon tank 42 actual gallons and I come to realize that my tank is too clean I've always tested zero for nitrates and phosphates Hanna phosphorus ulr and red sea pro test kits. So I shut down my gfo 2 weeks ago stopped doing 10% weekly water changes only going to do once a month now. Started dosing potassium nitrate my nitrates are 2 now which is where I want them but can not get phosphates up. Been feeding more has not made a difference. Did some research and found brightwell make Neophos which is supposed to raise phosphates but didn't find much about people using it. Should I just wait A little longer and see what happens or is there something I can dose to raise it up thanks