My second grow with Air Pot! (Quick One)

For my second grow I wanted to get rid of first time problems! First of all, I germinated with paper towel method and then let it sprout in a toilet paper roll. Second, I gently transplanted it in a 12.5L Air Pot after 2 days: with the toilet paper roll I didnt need to expose its root because the tiny pot is biodegradable and a useful nutrient source! Third, I chose a different soil: Compo Sana Universal soil, which is quite cheap and one of the best you can buy in normal shops; it has good fertilisers already in it, a root stimulator called Agrosil and some perlite. Moreover, I added 30% of expanded clay to make it lighter. In the little toilet paper roll I put some lighter soil tough because seedlings dont need fertilisers. I'm curious to find out if Air pot will boost its growth as advertised. Plus, I'd like to test LST in the next weeks!