Pineapple Express not looking good. Need advice

This is my pineapple express 5 weeks into flower. I have had this happen to plants in the past and couldnt get it to stop. Im thinking it is mag def but thinking there are enough master gardeners out there that could confirm this for me. It looks like this on about 20 % of the fan leaves. I am thinking there may also be some nitrogen def.

I am growing in Roots organic soil using Gardening Magic nutes. I am using water PHd to 5.5-6.5 based on a color chart. i have just orderd a digital tester.
I flushed her 2 days ago hoping it would help stop the problem.
Any advice would be appreciated.

I am not sure but, I think I see the leaf starting to curl upward. If that is a fact, then YES your plant is showing symptoms of Magnesium Deficiency. I recommend a product called Plump Juice; it has the purest form of magnesium on the market. You can add it to your reservoir or soil but, I would apply it by foliar so it corrects the problem faster. If you’re not sure on how to foliar feed properly then hit me up and I will break it down for you. I hope this helps you out!

Here is the label that I pulled off Twitter!

it looks like both Mg and Ca deficient, they sell nutrients blended just for this Cal/Mag def., that tends to occur more often throughout the flowering stages, primarily between weeks 3-the end.

oh and before you treat any of this, make sure to flush thoroughly to get rid of any salt build up. thats why youre all spotted and yellow

Yep, I have had this happen as well. The plant tends to PH up mid flower to gain phosphorous and when it does so, it is out of the Ca zone. My current plants are in the 6th week of flowering and doing this to me. I have adjusted by adding double the rate of Fox Farm Cha Ching which is rich in Phosphorous and cutting back on the other nutes to make room for the ppms. This seems to help some, but I always miss this, the plant shows me first before I know to Phos up and add cal/mag and watch that ph like a hawk.

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Thanks for the info guys. this is what i was thinking but nice to have others confirm it.
I have flushed the plant and started adding some cal/mag. Might be a little late for this girl but will be ready for the next grow.

Thanks,