Marc,

Thanks for the info. I live in NJ and usually don't open the windows
either. My house is pretty much climate controlled, but my system has
a fresh air intake, which I think helps to remove the CO2. Anyway, I
will try pointing the powerhead up to the surface, but since I have a
Remora AquaC with a maxijet 1200 on a 30 gallon, wouldn't that double
as an efficient gas exchange system?

Thanks.


Marc Levenson wrote in message ...
Often times pH drops when there is an excess of C02 in the tank, as well as the
air in the room that tank is in. When I open my doors and windows and fill the
house with fresh air, my pH rises quite a bit. However, in Texas it is either
super hot or quite cold, so I only get to do this maybe 2 months a year.

Try aiming a powerhead or two at the surface of the water to cause rippling,
which promotes gas exchange. This is more involved, but if your protein skimmer
is a venturi driven one, you could run a longer piece of airline tubing from the
pump all the way outside, to suck in fresh air all the time.

Marc


livingrock wrote:

In between water changes the further away I go from the previous WC,
my PH drops off the scale, if I add a buffer it raises it a bit but by
the next day its down again, all of the rest ofm my parms look ok.
Does anyone know what causes low PH?

Thanks.