NEW GROWER NEEDS HELP

So I am new to the whole growing thing, here is my list of products used.
I am using ROOTS ORGANIC SOIL, ADVANCED NUTES, R/O WATER, 600 WATTS HPS AND METAL HALIDE.
I use a ppm meter and a ph meter, I water with a PH level of 6.8 to 7.0 at all times. I started nutes at 100 ppm and am now to 550 ppm on some plants. on most of the plants I am at 3 weeks of flowering. the yellowing started a week ago and after I added nutes yesterday, I woke up this morning and saw a lot of yellow.
PH going in was 7.0 and coming out was 6.5. I already flushed soil with 6.8 water. I hope I am going in the right direction.
PLEASE HELP

pics please! the ph sounds fine. don't mess with it. obvious answer is nitrogen def but pics are needed

Yeah pics would help.

And are you using CalMag+? http://boards.cannabis.com/hydroponi...lmag-plus.html

:thumbsup:

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Originally Posted by bigtopsfinn

Yeah pics would help.

And are you using CalMag+? http://boards.cannabis.com/hydroponi...lmag-plus.html

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i think you hit the nail on the head!:thumbsup:

use cal mag through week 6 of flower....AN sells one for grow and bloom...if you follow AN's program they want you to use everything they make...some good stuff but if you look around there are far more simpler programs that yield just as well
:jointsmile: