For the most part i have maintained a very stable tank. Other than that alk spike i had last month my numbers have been spot on. I used to do wc every 3 weeks , i know do 2 weeks. Also like previously posted i use ocean water, and as far as my top of i use r.o from my lfs. Now i have no idea how much tds or how clean their r.o di must be, but their display lools amazingTriton tests are indeed informative but they are not a panacea. Coloring sps is dependent on so many key factors, from what's in your water that triton may elucidate, but there are lots of things that triton does not tell you. Triton does not tell you about chlorine,chloramine, tds and the other components of your water. Additionally, need to make sure you're maintaining all the basics of stability: temp, alk, ca, mag, nitrates, phosphates, flow, lighting, filtration. Neither triton testing nor the triton method may be the issue at all.