ak47 indica pheno

[facemelter]

So i have 12 ak47 in weeks thrree of veg. I have grown out the sativa pheno with good results so im doing a whole crop of the indica pheno i kept as a ma.
The first 20 days i had no problems at all great even growth all the way around. Untill now. I appear to have developed a phosphorus def in Some of the plants while others are fine. The systhem is recirulteing so this makes no sense at all to me.
ph6.0-6.2
ppm 800-900 gh 3 part
water temp is 68-71
room temp 70-74

5 out of the 12 plants are showing signs of the def. ie purple stems, stunted growth, wrinkled leafs and so on.

you can see in the side by side pic of the effected plant and the non effected plant.

Any one with any advise or experince int the subject that could hep would be greatly appreciated.

Thanks

 

[facemelter]

Forgot to add that i have airstones in the bottome of each bucket and the drippers are on for 15 off for 45.

 

[facemelter]

This shit os pissing me off to no end> How can one plant be fine and the one next to it be stunted and starting to look fucked. same clones from the same mother, in a recirculating system. wtf!!!!!!

 

[Isan]

How are your roots? Is the medium salty? I see salty drip rings. If I were stumped I'd play Detective later and first flush all medium and roots with fresh tap water, but only if decent quality and your plants can handle it. The tap water flushes the salts and its chlorine kills any nastiness. Then I'd recirculate with 50/50 tap/RO water for 3 hours or more to wash the roots well. Meanwhile I'd mix a fresh nutrient bath to start fresh , then wait.

 

[youngtrader9689]

Looks like over watering to me!

 

[zachrockbadenof]

we have used waterfarms n every grow had salt buildup on the rings... no matter what ferts we used... pita.. clogged up the holes... just a pita..

 

[Avinash.miles]

^^^ drip clean from h&G
no salt buildups