good deal! glad you got your problem solved!! now that your gross overfill has bee corrected, DWC growing should be alot less stressful. I use Advanced Nutrients for all my grows and rarely see a problem. It happens, but its usually operator error
i havent bought a bottle of pH up or down in over a year. If i ever need to check it i use pH drops. Like i said if something goes way off, i just replace with fresh nutrients