sounds like a very nice setup you have going....:thumbsup: Good for you to do it all the right way.

If your ph is rising and wasn't before.....I'd take a guess your ppms went too high and you burned them as Stinky says. I actually don't mind what you are using except that if I had all that stuff going on my ppms would be more like 1200.....and I dont use silica blast....not even sure what that is but again....like Stinky says....start small and move up. I would drop the Sweet from the program for now and cut your numbers down until ph stabilizes.

Watching your ph is your biggest friend here. If ph was stable and now climbs quickly....daily....AND is hard to drop back then I wonder about nute burn. That's one of the first signs I will see if my numbers get too high and is always a red flag to me.

If it was stable and suddenly starts to drop daily etc....makes me think the roots are dying off somewhere in the medium perhaps due to low oxygen or something along that line.

I love hydro.