How to control PH and KH?

[letdoit]

Heard that PH controller can control them right?

Example, If PH too high, it will auto ON the CO2 solenoid to bring PH down, am i right???

IF PH too low, what can PH controller do?

[letdoit]

hi, how to raise PH using ph controller????

[jun]

maybe coral chips do the job on pH??

[mansiz]

Rise or reduce your Ph to acceptable range, then maintain your Kh at 8 - 12, this will prevent Ph from fluctuating. But be sure to main your Kh, as it will keep dropping depending on how much LS you have.

[jervismun]

Yes I personally find KH very crucial in the balance. Do keep your KH within range of 8 to 12ºkH and you will find your pH pretty stable too. In regards to pH Controllers, there are usually used together with Calcium Reactors or etc. Not so much in bringing down pH (solely) using CO2 (at least I've never come across any reefers locally using this method to bring down pH).

As mentioned by bro Mansiz, KH gets depleted pretty quickly, if you do not have a Calcium Reactor... 2 to 3 times of KH dosing is not uncommon (depending on tank volume).