I run a 180G reef tank with CA reactor which drives down the PH. I use reef buffer once a week. 3 tablespons in a gallon of RO/DI water which I drip into the tank. My PH is usually at 8.2 day now, corals are way happy, Ca at 450, ALK @ 12 DKh. I have a sump, 50G full of caulerpa which grows like...