So I ran out of my alkalinity test lest week so I ordered a new NYOS kit along with a Magnesium and Phosphate one. I was using API and getting a reading of 7-9 all the time. Everything was good. I noticed my few frags of SPS didn't open one day while I was waiting for my new kits. Then overnight my hydnophora bleached all but the tip. My birds of paradise is looking okay but the tips are a little whitish. I got the test kits today and saw my Alk was 15! I really wish API didn't make such inaccurate tests! So this leads me to. How is the world did my Alk get so high and how do I lower it. I do not have a Calcium reactor, and I do not dose. Any suggestions?