Hello everyone. I have a 90 gallon tank that I have questions about how many bubbles per minute that I should have going through my bubble counter. Currently I am having about 1 bubble per 1.5 seconds which then goes into my CO2 Reactor 500. I don't see much pearling that you guys talk about. My ph swings daily. In the morning it is at 7.1 and then at night right when the lights turn off it is at 6.8. My kh stays steady at 3 degrees. I have my co2 system on a ph controller from milwauki instruments. I also have a red sea drop checker that stays constant bluish green. Oh one other thing I noticed yesterday on my co2 reactor is that I had the venturi valve on it's lowest setting all along. So I went ahead and moved it 3/4 of the way to the highest setting. Do you think that has an impact?