Yellowing between veins plus stunted growth

[ajc1213]

Hey I'm struggling to diagnose this issue, I've tried adjusting the lighting, giving extra of all noots (primarily calmag as I thought that was the issue at first) and nothing seems to be helping. Feeding every 2 or 3 days in coco around ph 6.0, lights currently around 26inches away on 40% (spiderfarm sf1000).
Around a month in now and growth seems to have pretty much stopped, but so far no wilting or drooping. Feel free to let me know if you've any ideas thanks

 

[ajc1213]

 

[BearWater]

lights currently around 26inches away on 40% (spiderfarm sf1000).

Try raising the light up more : ) Im using a sf1000 right now. It’s a power house of a little light!

 

[ArtfulCodger]

It's called "tips & stripes." Your light level is outrunning your nute uptake. I'd turn the lights down or move them higher.

 

[ajc1213]

A little more info, humidity is currently around 70% and temps 18c. 16 8 light timing

 

[ajc1213]

Appreciate the input will turn them down more thanks

 

[Bubblegumyum]

A little more info, humidity is currently around 70% and temps 18c. 16 8 light timing

18C is a bit cool for lights on. Low temperatures make them grow slower. Would be good to get up to about 20C to 24C

You could lower the humidity a bit, as that will raise the temperature, but don't go below 60% during veg

 

[Blastfact]

Need more "N"..... Growing in coco is slowmo hydro. Get the nutrient numbers right and drench the coco. Then measure the run off. Then when you water next measure run off. Then adjust nutrient levels and balance it out. Need to research growing in coco and EC. Once you find the balance then you will need a lot more light than that little 100w light. Good Luck!