Cannabica autoflowers

We transplant the plants on a Sunday ( March 12) after a while on the cell, we were able to spots some roots so we thought the time as come. We're using a autopot system and once we just have experience using this on photo period plants, we decided to dont fill the whole pot with 15L. We fill a little less just in case because we dont know for sure how the root system of an autoflower will deal with this. From 5 seeds that I we germinate, all of them popped. One died 1/2 days after, it seems to me that the genetics of this one wasnt pretty great. The roots were not strong and the plant could not sustain itself. Other seedling didnt developed well cause it has too much stress - from all the moviments that I do with the plants in order to take good quality pictures, and also because the transplant- we decided to put this little one in a mug and grow it outdoor in the sun. I was waiting for other strains to arive so I transplant 2 of those ( the stronger ones) to the autopots and other to other pot. Still have 2 auto pots to use. My soil is a mix of coco and perlite with myco. For now we are not using any nutrients and we are top feeding the plants. Its going to be like this for 2 weeks until we turn on the autopot system and then more 2 weeks complementing the watering on top in order to the plants get used.