Yup mine stays exactly where i put it my full reservoir fill. I thought you said you were switching from floraflex for sone reason?
No I am vegging with Jacks. And flowering with floraflex b1 and b2. I didn't have any luck vegging with b1 and b2 per their "simple schedule" (5g/gal of each)
but floraflex is better quality IMO. Jacks goes to mush when it gets humidty. My floraflex is as dry as the day I bought it. Floraflex holds the PH for twice as long (actually I used up the res in a week. So for the life of the res the PH was good. Not the case with Jacks for me. They both dissolve very well. But still I'd tip the hat to floraflex on that too.
but Jacks is like 1/5 of the price and gets the job done in veg very well.
but I plan to stick to floraflex for flower and also gonna fuck with adding bulky B and full tilt. After this crop maybe.