Help needed, what is wrong ?

Hey, just started to notice recently the colour change on some of my leaves, this is the first grow in COCO and using canna start, they are under a 150W blue spectrum CFL, and the LST technique is being useed on them as well.
Any idea's what's wrong ?

check the ph off your run off water,looks like a ph issue to me

Thank's, think i will have to buy a PH tester!

U can buy cheap ph meter + buffer. ,,,ec meter
dont forget buffer for your ph
if u found,buy both of them in once

Cheer's dude, Could this also be a sign of a lack of nute's as well ? couldnt the plant be taking the nutes from the lower leaves to help the upper leaves grow, which is why maybe the top looks like and green and the bottom ones are ' Shite '

StickyGreeenStuff said:

Cheer's dude, Could this also be a sign of a lack of nute's as well ? couldnt the plant be taking the nutes from the lower leaves to help the upper leaves grow, which is why maybe the top looks like and green and the bottom ones are ' Shite '

Click to expand...

U r true my fr chk my new thread ( plz chck) thats all my plants like yours
but not now , later

You have to know the ph specially in hydro cause it's lower than in dirt.
No nutes the first week maybe 150-200 ppm the second weeek or the
first watering. Ya you gotta git a ppm and ph tester~