On Dec 4, 11:30 am, Wayne Sallee wrote:
And the ph will also reflect the co2 content of the
air in the room.

yeah, true. hopefully theres enough fresh air in the room. usually
if theres enough to keep people alive, theres enough for the tank,
lol. but ive heard about cases where there wasn't enough air flow
into the tank due to a closed light hood and stuff.