My mates dog has a problem.
His setup
5 chronic in large 4 pot wilma, 1 Mother for clones.
GHE nutes 1.6 ec
Ph 6.0
Co2 750ppm
1x600 sunmaster sodium
1x300 red florry
1 airstone
1 mix pump, 1 heater......temps 86
His plants have been 12/12 for 4 weeks they are about 5 ft high and 3 ft wide give...
I know a man that has exactly the same problem as yourself gooey light tan sludge like snot, blocked all drippers and killed off roots. anyways what he is doing at the moment is.......
cannazyme to kill dead root crap, root juice to try and stimulate new root growth, rhizotonic to try and help...