PIF Ihave tried that and it doesn't work for me. Bits of clogged root etc won't come out without taking the ring off and rinsing it with some decent water pressure.

HOWEVER: After studying your m.o I tried it with a few modifications (draw out old solution from buckets, adjust ph and ppms and return it to the top res allowing the newer stuff at the bottom (already ph correct because its ALWAYS 5.9 in the damn res) allowing the newer stuff into the buckets and recirculating the solution. I may even modify this by running the old solution through a screen or something to get out crud but I have been doing this for several days now and have not had to check the individual buckets (yeah!!!) because I know the solution is good AND have not a clogged drip ring for 4 days---a record at this stage of my grow. THANKS!! XXX