What is wrong with the plants

[didyouknowdia]

Hi all!

I need some help with my plants.

strain is white russian, i am using them for years and never had an issue.
I have just moved to another building to grow in a sealed room.
growing on soil.
EC is 1,5
PH is 6,1
EC and PH meter have been checked if calibrated correctly

The problem is that the leaves turn yellow after around 4-5 weeks of growth. Only the new leaves are affected, the older ones stay dark green.

because it is right now not available to me I am using canna aqua vega instead of canna terra vega, could this be the issue? I have done it before and never had problems.

Here are some photos:
http://imgur.com/a/T8mkk

Thanks for you help guys!

 

[zapallo]

i dont know what can be your plant's problem bro hehe but 1.5 EC sounds like a lot to me, specially in veg, and i think the aqua fertilizer might have more minerals than the terra, so maybe it's a salt accumulation problem. just saying, did your try flushing?

 

[justanotherbozo]

...i'm having a little trouble seeing the problem.

peace, bozo

 

[fatalxerror]

looks like deficiency to me (yellowing) could be caused by ph problems.