My light is limited to 1 24w bulb at 5,5hrs/day which you recommended, always on at the same time and I do my water changes before the lights turn on.
I turned up the co2 a bit, should be lime green, and added the external pump to get the water moving some more and adjusted it to make ripples at the top but to hit against the glass and move everything downwards...
If you're referring to the bubbles on post #50, those are not the bubbles from the co2, that's from the water cahnge on the glass... if you look close to the opening of the hose, you'll see the tiny co2 bubbles from the canister and you can follow then... the bubbles literally hit the front left corner of the aquarium from the back left corner and then moves back...
I read some of the posts in the water flow thread, I will continue reading today, I would prefer doing spray bar but then would need a different solution for my co2 distribution... and will need to get a good spray bar and not the cheap black plastic:\ I will also read about the ph profile check.
Thanks for your help, if you have any other ideas let me know.