I will be using StepWell supersoil and 4 of the regular 15L autopots next round. Since this is my first time at this I have a few questions, Is adding a layer of clay pebbles necessary? Also StepWell says their supersoil is about 22-25% perlite is this too low? Will adding perlite to say about 30% be beneficial? Also regarding nutes I have Gaia Green All Purpose Organic 4-4-4 that I will be using. Now I used to top dress with this but with autopots Im thinking of adding the Gaia Green to the bottom half of the container mixed in with the supersoil and leave the top of the soil regular to not stunt or hurt the seedling. This way their will be food available for them in later stages. Again this will be my first go at this setup so if anyone could chime in with some tips I would greatly appreciate it! Thank you