dwc bubblponics grow what is this

http://www.420magazine.com/forums/deep-water-culture-dwc/140303-dwc-grow-what.html hey this is one of my grows right now if you can look at it pleasee give me some input i have no idea what this white stuff is on my roots and air stones its white gooey i have never seend it befor any info would be great

I dont know but its happend to me before. maybe its your water? maybe I dont know.

what kind of ph down are you using?

iv got got another grow seprate room usign all the same things but have not seen it in there at all, do you know if its bad for the roots, my ph down is the general hydroponics,

try using advanced's ph down i had a similar problem awhile back it was my ph down i too was using gh's ph down. the citric acid in the gh ph down was the culprit... i don't like advanced but their ph down is effin solid

ok ill check that out thanks

But with the Advanced be carfull it will take less to bring your PH down the same amount