for the guys and gals already using MC (I won the medium bag), i'm having issues with pH dropping steadily downwards. Is anybody else seeing this? I'm doing DTW and have mixed up 15 gal of RO and 15 gal of well water and after I set the pH, it drops daily until it gets out of range (less than 5.5) in less than a week. i had this same issue when i tried using fulvic acid a year or so ago and wondering if it's the humics or fulvics in MC? any advice? thoughts?