my flow stays the same other then my rotating power head i might try and move some of my Karola's around maybe that is it. I did do some cleaning the other day maybe they aren't in the same position, i know the flow might be changing during the day also because of the extension of other corals. Let me do some thinking on this one!
As for the PH some say it may have something to do with the ceasing of pulsing and others say it doesn't so i guess you take what you want out of that. I know that Ph raises during the day and Ph falls at night maybe the Ph is getting to high when the lights come on, because they pulse at night now not during the day?