My water comes straight out of the tap, then i let it sit for 2-3 days. The chems are so high you can smell the chlorine. I use neutralizer solution for the chemicals and pH U/D to adjust. I use an Eco2 Ph meter and calibrate every week or two. It doesn't need it that much but one can't go wrong checking. Solutions are always around +/-78deg. The room gets hot but the air moves 24/7. I'm using FloroNova
Something that's a good idea: fert/flush all medium that you'll be using for the transplant, let it sit for a day or two, check the runoff pH before you repot. That should help insure proper pH in the medium.
CalMag is another amendment i use to correct pH, along with superthrive,root stimulators, vitamines etc.... hydrated lime or gypsum if soil ph got too far off. Now i can just flush,hahah, this is gonna be soooo eeeasy:yippee:.
There were other comments/questions that i seem not to remember and the keyboard is starting to looking funny so i'm gonna go smoke one maybe two or until my memory and vision come back.