Parameter swings

[mpnunley]

How do I keep my Ph and cal stable inspite of me dosing kalkwasser to my tank I have just bumped up the dose to 2000ml a day I use a apex and trident and my Ph will get as low as 7.75 then swing up to 8.01 and cal will swing from 383 up to 424 my other premature don't really swing that bad temp stays at 77 to 78 salinity 34.6 to 35 alk stays at about 10 it moves a few 10ths mag stays at around 1422 is the low and max was 1448 my tank is a 180 and with the sump I figure its about 200 to 210 my lights ramp up and down with a 10 hour light cycle I have a refugem that runs reverse of my light cycl

 

[Randy Holmes-Farley]

Calcium is not swinging like that. That result is test error. In 200 gallons, 2 L of kalkwasser only adds 2 ppm of calcium.

pH does not need to be particularly stable to be fine.