I do the opposite of your method mate,I find if the soil is to compact then air will not get into the soil or the roots,which is what the airpot is designed for,I use a light soil with perlite in..when I water I first water half of what I'm feeding,I then wait half hour ish and return to add the rest,this way iv found I dont have much water trickling outa the holes and my pot gets fully watered..