Does one match up PH with or without CO2?
So I have a new planted tan, 30G, about 2 weeks old. Planning to add CO2 this week. My tap water is 7.4PH. I am planning to add tertas that need 5.5 to 6.5 PH. I read that adding C02 will bring the PH down? Is that correct to say that?
So.. to take measurement of PH for my fish.. do I have to match the PH without CO2 in my tank or its ok for lower PH but with CO2?
Also, anybody has used seachem acid buffer to lower the PH? Is it stable to use in the long run or cause swings?