Thanks Polish, greatly appreciated. That clears up a lot. You answered a question I hadn't asked yet .
It makes perfect sense to add a mix of nute/water to rez's with low ppm counts/higher pH, because as you said the ppm levels are down when ph goes up. (Most likely), always will check before I do it though. I understand that fully now. I had read and heard to just use ph'd water during feedings, which is why I was wondering what to do with my current situation of low ppms.

I checked all my rez, and two of the 15 had low pH of 4.5, and all the others had 6.5ish. The one that had the most curling was one of the lower ones. The two that had the low ph, were the biggest. I dont know if this has anything to do with it, but maybe they are further along in flower then the other gals? Bigger plant, faster cycle? Higher ppm levels in those 2 as well.

I topped them off with just water this time, didn't read the post in time But this is day 5 of the nute mix, so Im thinking on day 7 i'll mix a fresh batch up.

So about me using 5.3ph top off water. Lets say I check a rez, got lower ppms, and it needs water. Do I Use the same ratio of nutes to water as I did when I made the first batch, but just for the top off amount? When nutes get taken up, ph goes up most likely. So in this case, lets say Im dealing with a 6.5 ph level in the rez before I add anything. Would I then pH the nute mix to 5.5-5.8 to account for the overall pH in the rez? I know you mentioned 6.3 ... Or add the mix to the rez, stir it up, then pH the whole rez? There's gotta be an easier way to do maintenance on the rez's then im doing lol. I have an 18g tote that has its lid cut for two of my netted pots. Because I was going to use those instead as rez. So when I do my work on my rez's, one or two at a time, i lift them into that tote as gently as I can, then do what I need to.

Sorry for all the q's, and thanks in advance for the advice. I love learning about this stuff, it's fascinating.