Ppm and additives help?

I usually adjust my ph to 5.4 then let it rise to 6.4 before i put it back down as i belive that diffrent nutes get absorbed at diffrent rates at difrent ph i have put my ppm down to 900 and going to see if it has stayed about the same so hopefully now i am getting my nutes dialled in my temps all good and good aircirculation i should be in for a great harvest
thanks for everones input and help .

superstoner1 said:

if you use high ppm and certain nutes you will have salt build up. a 24hr flush will do wonders for the plants. it will not stunt the growth,plants have plenty of stored nutes, it will in fact promote growth because roots will be able to absorb more easily after.

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True.. I flush mine 2 times in flower day 23 and day 43.. for 24-48 hours then add nutes to that solution. My flush is around .6ec then I raise it to normal range when flush is over.. so they never go without food just much less for that period. I used to do just RO water for the flush with no harm then tried the .6ec for peace of mind. I do agree they can go days with just water mid flower without any noticeable problems...