Increasing pH and KH

[myo]

Since starting using pressurised co2 in my plants tank my pH and KH has dropped like crazy. Down to a pH of 6.1 and KH of 1.

Someone was saying adding marble chips in the filter will help bring this back up; however I can’t find any.

Is there anything else I can add...limestone, shell grit. etc that will help?

 

[goatnad]

Crushed coral is good at raising pH and kh. You can get it at any fish store. I know petsmart and Petco sell it.

 

[myo]

Crushed coral is good at raising pH and kh. You can get it at any fish store. I know petsmart and Petco sell it.

Thanks for that mate. I’ll see if I can find it and chuck a bag in the filter