mauve stems

[Epod]

hi all any know y my plants r showing mauve stems
system: 3kw
hydroponic :
Ph:6.5
Ec:1.8
water Tap: 125lt
temp: 18c
ionic grow 200ml
diamond nectar 250ml
chlorine: .5 ppm

I have never seem this before in my strain I was wondering if something is going wrong I lost my last but 1 crop to a pathogen all tests show it has gone with a total rebuild so not to shore y
Ps: I meant purple not mauve stems

Thanks

 

[Catatafish]

50ppm chlorine is really high isn't it?

I have been using .5 - 1.0 ppm

PH seems high too without knowing the system type

 

[Epod]

sorry I meant .5 and 6.5 ph here is ok for my plants

 

[LokiLoki]

my best guess is that you might have a bit low temperature

 

[Epod]

well do u mean water or air temp is low

 

[seekingbalance]

your pH is high enough that some nutrients are suffering absorption problems. purple stems, especially when they are intermittent or not universal on the plant, are a sign of poor absorption.

hydro pH should swing between 5.8 and 6.2, never below 5.5 or above 6.5. ideally you'd walk the pH from 5.8 slowly up to 6.2 over the course of a day, and then reset.

 

[Lester Beans]

that's how I run my ph. Set to 5.8 and let drift up to 6.2 and reset. I only top off with plain ph water during week until res change.