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Alk is going up
Last week I noticed my alkalinity was high, it was nearly 15.5 dkh. Took my mall stirrer offline and straight ro water for tip-off. Been testing daily ever since, started to see a decline. Monday it was 13.05 dkh. Tested this morning when I got home from work and it has gone up, now reading 13.45 dkh. Why would this go up if I am not dosing to the tank? My nitrates are around 2-5 (salifert test and my eyes can’t tell which one it is, phosphates are .1 calcium is 475. Mag is 1320. Some corals don’t seem affected while others have no PE.
So questions are
1 why has the alk suddenly gone up?
2 best way to get it down?
Thanks in advance
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