Just added nutes (Canna terra vega) to some distilled water I bought from walmart and I foumd this to drop my ph from 7.3 to 4.0 or so. Directions say to add 19ml to 1 gal of water but I only added 5ml just to start my 3 week olf plants. I tried dumping some water out and adding fresh water...but thia didn't do much. What should I do..... I have some 7.0 ph buffer that came with my ph meter....would that help