Can't get PH up!

[titus]

Hello,

This topic has come up numerous times in the past and can be a result of many different issues. Bottom line is:
1) Good gas exchange
2) Water change

Quite often if dosing supplements doesn't help it means there's something out of parameter. So assuming your system is properly setup and without having to find out what exactly is the problem, water change would suffice. How often do you do that by the way?