I do run my fuge on a reverse cycle to try and counteract it but I still see my PH drop at night.
During the day plants an many corals remove CO2, which makes the pH go up. They stop this at nigh and most actually give off CO2. So, the pH goes back down. Are you using a calcium reactor by any chance ?
What would be a reasonable drop from say 8.1?
.2 pH or 7.9 - 8.1. 7.8 - 8.1 is getting a little low but many are at that.
Why some days does it drop more then others, CO2 in the room levels? [/b}
Yup, most of the time as you go in and out of the house some CO2 goes out the door with you and the same for furnace or AC kicking on and off and stoves and more people, dogs,.etc in the house. Then, there is that CO2 pressure build up where it gets to a point and leaves the house on its own easier, pressure drops and then climbs again, then drops again. If you have 2 car tires the same size and one has 10 psi and one has 50 psi which one leaks more in time if there is a leak ?
On reefs somewhat the same. All those corals an algae are sucking the life out of the CO2 in water, at night they shut down, give off CO2 and the CO2 goes up and the CO2 can not leave the water fast enough to keep the pH where it was so it drops. Same for O2, all those corals and algae giving off O2 during the day and then at nigh shut down and take up O2, thus O2 crash's so speak like the CO2 and pH.
During the day plants an many corals remove CO2, which makes the pH go up. They stop this at nigh and most actually give off CO2. So, the pH goes back down. Are you using a calcium reactor by any chance ?
What would be a reasonable drop from say 8.1?
.2 pH or 7.9 - 8.1. 7.8 - 8.1 is getting a little low but many are at that.
Why some days does it drop more then others, CO2 in the room levels? [/b}
Yup, most of the time as you go in and out of the house some CO2 goes out the door with you and the same for furnace or AC kicking on and off and stoves and more people, dogs,.etc in the house. Then, there is that CO2 pressure build up where it gets to a point and leaves the house on its own easier, pressure drops and then climbs again, then drops again. If you have 2 car tires the same size and one has 10 psi and one has 50 psi which one leaks more in time if there is a leak ?
On reefs somewhat the same. All those corals an algae are sucking the life out of the CO2 in water, at night they shut down, give off CO2 and the CO2 goes up and the CO2 can not leave the water fast enough to keep the pH where it was so it drops. Same for O2, all those corals and algae giving off O2 during the day and then at nigh shut down and take up O2, thus O2 crash's so speak like the CO2 and pH.
