Grow Mediums What is killing my seeds???

[Fantasy Island]

Hey, so that one I couldnt save but the other one is healthy and growing like a beast!! So I am happy with that!
Guess I will need to wash the shit out of my coco next run...speaking of my next run..all i hear are awesome things about
Mephisto Genetics...Fantasy Island, I see you grew a few..what is a good daytime strain that doesnt grow too tall?
Want to do 2 different Mephisto strains... Any suggestions would be apreciated!
Thanks everyone for all your help! You gys are awesome!!

Whats up dude. Here is a guide to the Mephisto line up that will help with sizes. As far as daytime The ones i grew was an alien toof She was huge. Next was a mystery that was either a sour bubbly or HBSS again huge. So I can not help you with your day time high and size restraints. I am growing 2 auto triangle kushes one in a 1 gallon pot and the other in a solo cup sorry to say but they are getting huge (Not really sorry). The one in the solo cup is 19" right now I also have a sour bubbly in a Solo cup that is 17" only differnce with the solo cups is they are not as bushy.

Hope this helps you out dude. Might need to look at lst or Topping to keep the small.