The tips of the top leaves on the plants I have in a top feed bucket system are curling down. I have heard this is due to nute burn. What is the best way to fix it? As of right now I have replaced the resevoir with plain water with a ph of 5.8. Is this the right move and how long should I let it go with the water flush? Also once it is finished flushing, what strength nute solution should I use, appx? Cheers.
sounds like tip burn. this usually means your ppm is a little high. back off a hundred or two and it should pass. you really didn't need to flush.