This is the 2nd day in a row ph has dropped a whole 2.0 overnight! Last night i checked all the roots, cleaned filters and checked pipes for clogs. Everything looked good no signs of rot or slime in the system but ph keeps drastically dropping. If its not root rot or slime is it possible pathogens are getting in through my ro filter. I am over due for changing these but still didnt think it could make that much of a difference. I have got quite a few undercurrent runs under my belt but have never seen ph swing like this! Any ideas on the source of the problem here?