Constant pH rise, what does this mean?

So this being my first aeroponic experience, I'm not sure if this is a phenomenon that all hydro/aero growers encounter, but my pH rises roughly .05-.1 per hour. I would assume that the plants are secreting metabolites or waste into the water as it's being sprayed over the roots and this is causing the constant rise in pH. I am using GH flora line at 400ppm and am 2 weeks into veg. My timer is set for 1 min on 7 min off for the sprayers.

A few questions:

1. is this normal or does it indicate something is wrong?

2. will it ever taper off, or will this continue for the entire duration of the grow?

3. if this will continue, is it prudent to set up some kind of pH down drip system to maintain the pH at 5.6-5.8?

4. should I do a flush with Clearex?

I find myself having to adjust the pH manually every few hours anyway so I was wondering what hydro/aero growers normally do about this?

What is your water like? PH, ppm? RO ,distilled?

I had a slime problem 1 time. Talk about a ph nightmare before I identified it. That was it.

With my floranova I adjust twice in the first 24 hours. Then I'm good to go till the bottom falls out.

Well generally we adjust it manually until we figure what the hell is going on.
It is somewhat normal for pH to rise in a res as the plants use nutes so you are going to have to deal with it but I'm talking a point or two over a couple days. I've set up a top off res with lower pH water before that works good. Tap rises more then r/o will.

Oh boy, so it sounds like this sort of thing isn't normal. My roots look ok and I don't see any slime. I am using RO water that is also deionized so the ppm is literally 0 before I mix my nutes in. This kinda also makes the pH hard to measure with no solutes, but I think it's somewhere around 7ish, as I would imagine pure water would be.

I did have an issue with my plants where they remained in Clonex solution for way too long after developing roots, I'm talking weeks, and they have been growing but started to show signs of serious stress like having really deformed leaves, lots of single blades, no veins etc. They have been in the aero tubes for a week now with normal GH nutes and seem to be returning to normal, starting to develop good leaves again. Perhaps that is causing this violent pH rise. Could the plants still be holding on to the clonex after a week and be releasing waste into the water?

I even did one 24 hour period where I changed the rez and just flushed with pure DI water (pH adjusted to 5.7 then resumed normal nutes. Plants are returning slowly but surely, but maybe I just stressed the hell out of em. Also, I'm not sure this has anything to do with it, but the humidity in the room is very low, around 20% with the fan blowing. Just thought I'd mention that.

Yea, could be, if you mixed clonex at manufactures recommended amount that's like 800ppms isn't it?
That's pretty high for the first two weeks. I would think what was left would wash right off though.

seems like too big a swing, something is off. be a detective and work it out. may want to deep 6 those and start over, sometimes we get too cought up in trying to save plants when in reality we need to start over. but i dint think the plants alone is causing that much swing. jmo