Higher PH and increased alk consumption …

[BAMatter]

I have a 75 gallon tank with sump, approximate 85 gallons total. Since the warm weather hit, my PH has elevated substantially. I was dosing kalkwasser at a rate of 1ml/min 24/7 along with 25ml each of ESV B-ionic alk and cal. Alk was around 9.3-9.4 and PH 8.14-8.30 swing. Since PH elevated, it has been upwards of 8.3-8.46 swing. I dropped the kalk down too .5ml/min and I’ve also had to increase ESV up to 35ml each since alk dropped down to 8.9dkh. It was not staying stable with 35ml and I again bumped it to 45ml. It tested 9.0 today from 9.1 yesterday and I’m wondering if the higher PH is causing the increased calcium consumption, or if I could be precipitating? I don’t see any evidence of precipitation but could this be an indication and I’m missing it somewhere?

 

[blaxsun]

A higher pH will generally result in more coral growth, so there could be a slight uptick in calcium intake.

 

[BAMatter]

A higher pH will generally result in more coral growth, so there could be a slight uptick in calcium intake.

I knew that, just didn’t know if 20ml worth of 2 part was reasonable. It translates to roughly .5dkh…

 

[blaxsun]

I knew that, just didn’t know if 20ml worth of 2 part was reasonable. It translates to roughly .5dkh…

I mean, I average between 80-100ml of just alkalinity daily (and my pH is lower than yours).

 

[BAMatter]

I mean, I average between 80-100ml of just alkalinity daily (and my pH is lower than yours).

Yea I gotcha. Just seemed like a large jump in 2 part needed from 25ml to 45ml. I’ll just keep on monitoring.

 

[blaxsun]

Yea I gotcha. Just seemed like a large jump in 2 part needed from 25ml to 45ml. I’ll just keep on monitoring.

It is a big jump. A +/-20ml difference is fairly common for me, but that's mainly because the Trident adjusts accordingly.