Ok so I keep my tank in my bedroom and since I have been running the AC most of the time, the pH drop at night has increased by 0.1. I am running a C02 scrubber at night and I turn it offline during the day because the pH goes up to almost 8.5 if I don't. I am also running my refugium on an opposite photosynthetic schedule. All of lps and acros have been fine. I use TM pro salt and my alkalinity has stabilized at 8.3. P04 is 0.06 and N03 is 0.8. My acroporas are still growing frags so I would like to lessen the pH swing for optimal growth. I have about a softball size of chaeto in my fuge and a piece of red pom-pom gracileria. Any advice?