I need help quick. I am guessing that the plants are using the CO2 rapidly?

That's what it looks like, based on your water parameters, but jeez, you've
only got 2 watts per gallon. I wouldn't expect you to have this problem.

Do you have a lot of surface agitation? Surface turbulence is a good thing in
a non-injected tank.

If you have a lot of aeration but still have problems with high pH, then yes,
turn off the lights. That will help.


Leigh

http://www.fortunecity.com/lavender/halloween/881/