It wasn't bad to flush with the 7.7 pH water if that was what was needed to bring your soil's pH back up. As far as the nutes(I think i remember seeing Grow Big, so i'm gonna assume FF), go to their website and check out their feeding schedule poster. I would also recommend, if you use FF products, reading their FAQ section of their website. It has a ton of useful information for people who are new to fertilizing their grows.