So if it's respiration which lowers PH then .....
Cause there does not seem to be anything in there that needs photosynthesis, right? I get the concept and the chemistry just not the application to this FOWLR
tank. Something is low somewhere, alk
, lids, bad environment. I just don't but the PH goes down at night just because it does. If it goes up during the day because of Photo and there's no photo-'plants' then it stands to reason.
Anyway.. either way. I would stil think the PH difference between the probable LFS
PH and your tank would be troublesome..