PH Movement? 7.2 night 7.4 day...How do I balance?
Basically my PH goes down a couple tenths at night (from 7.4 to 7.2)....I am assuming it's due to the plants breathing reversal. I have CO2 on a regulator and a PH controller. The ph out of the tap is 7.9, gh 7 kh 4.5. My tank is 6 1/2 feet long and I have 6*96 watt pc lighting fixture. Is there a way to stabalize the swing?