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29Nov

Water tests and what they mean to me

  • milka-120715_0

11/28/15 Performed water tests at 1 a.m. specifically because I spotted some STN in my tank all of a sudden.

Temperature late at night read 78.1 °F
Looking at the temperatures recorded by the Apex recently, I had a significant swing due to our weather change over the past 48 hours or so. The low was 77.1°F and the highest was 80.6°F, which is roughly a 3.5°F swing and more than I usually would allow. Maybe this is why three corals are reacting. Not sure, but it's definitely a consideration.

23Aug

A sneaky alkalinity swing

  • alk-hdr

I recently had an alkalinity swing creep up on my reef.  Normally I like to keep the tank around 8 dKH, and yesterday I noticed the duncans in my frag tank (part of the same system) were closed up. One bad habit I've developed over the years is to watch the corals for indication of problems instead of water tests each Saturday like I used to perform.  I need to get better about that.  I did a quick check with my Elos Alkalinity test kit and was shocked when it hit 21 dKH.  So I tested again, and it measured 19 dKH.  Safe to assume it was about 20, way too high.

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