Rising alkalinity after pegging pH at 8.3

[Morpheosz]

There is a mathematical model for pH, Alk, and CO2. I use the pyCO2SYS python library to do the calculations.

Given an 8.2dKH and a pH of 7.9 NBS, a perfectly aerated tank at equilibrium with the air would expect an air CO2 of 1100ppm.

Given an 8dKH and air CO2 of 700ppm, a perfectly aerated tank at equilibrium with the air would expect a pH of 8.07.

Take all of this info with the understanding that our hobby-grade measurement are not very accurate...I've most often seen pH issues really being measurement issues.

Awesome, thank you!

 

[thatmanMIKEson]

I do it a different way. I dose saturated calk solution to almost my evaporation limit for the alk and Ph boost. I make up the rest of the alk needs with all for reef. Keeps ph between 8.2 and 8.4 plus I get some trace elements.

I'm gunna say I can tell, your water has a pale white haze to it.