Im just wondering if high alkalinity is really a problem. High alkalinity means that I have plenty of buffering capability and my corals have enough bicarbonates to use.... Whats the downside to that? My calcium runs at 450-480ppm and my PH is around 8.0 to 8.3. Ive been using Salifert test kits. When tested, my dKH is through the roof, in the 16 range. I have been reluctant to fix that problem because 1. I don't have an RO/DI system and 2. I don't see any negative effects on my corals. I have recently tried SPS and they are all growing... so that makes me happy and indicates to me that everything is ok...
I know I am kind of breaking the norm of using tap water for my tanks, but everything is growing and my SPS is coloring up. When I test the nitrates with my Salifert test kit, the nitrates are at absolute 0. The only downside of using tap water, for me, is the high dKH, and I don't even know if that is much of a problem....
The main reason why I would like to use RO/DI is to cut out heavy metals. I think I have been pretty lucky, but how long will my luck last?