I'm currently doing autopots with freedom farm classic and TA pro organic nutrients which is meant to be a organic nutrient for drip systems.
I have 15l pots and top fed with plain water for the first 2 weeks until the roots reached the bottom. When I activated the autopots the first res was filled with water only and the plants did not like that at all.
I then started feeding with nutrients and it has been going better but the grow took a knock from that first res with just plain water.
I will try it again on the next run and do nutrients in the res as soon as I start using the autopots
Salts with autopots is definitely easier but I will only make up my mind after the next run