Originally Posted by Clayton_Bigsby
My seedling mix is peat moss, coc coir, EWC and perlite. I added a little bit of seaweed kelp as well.
Im running CO2 in a sealed room at 1100 ppm.
1. The mix introduces a lot of variables.
If it was just coco coir and nothing else, I would say just give the plants a low dose of high P/K flowering food (0.4 EC of Plagron Green Sensation, Atami B'Cuzzz 0-20-30 or Canna's PK 13/14), and 0.1 EC of Epsom Salt for magnesium for the leaves. P stimulates root growth, K stimulates stem and branch growth. PH 6.0, the same as the medium's pH.
2. The sealed room
I'm not an expert at sealed rooms or tents, however I would make sure there is enough air, etc. They're not taking up a lot of CO2 at this size.