... regardless I'd contact the vendor and see if you can't get a replacement or something. If everything else germinates it might well be the seed
"Thanks for dropping an email Honestly that is a pretty old technique to be propagating like that ,distilled water?? ,get on a shogun start or rizotonic ,straight into cubes and light on ,no touching and passing of germs maybe ,not had any other problems with this seedbank ,I would drop purple city genetics an email see what they say ,did you take pictures ??
Ukseedstore "
I'd be starting some weak veg nutrients on the pale one. It's getting a slight need for phosphorus( purple on the petioles).
First, CO2 sinks, so being under the planter isn't likely to do much. Second of all, my meter says we produce a shit ton of CO2 just hanging out with the plants for an hour, I increased the PPM to 1500.
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Unless you are running a sealed room, I don't think you'll notice much of a difference supplementing co2 vs not.
Also 600 ppm for some seedlings seems kinda high. I'd shoot more for like half that. When dropping fully rooted clones they only get 3 400 ppm in my trays until I actually see growth.
I don't run any sort of co2 supplementation at all.just got 13z from 1 stardawg under led.