as long as you dont overfeed , dont worry bout anything comin out the bottom. a 2 liter is going to dry up very quick , so i see no probs in your setup.i have a few lr#2s in soil in a grow tent.they are at week 5 and have never have added enough water added for it to come out bottom of pot.do i need to flush out the pots on ocasion?i use ferts lightly 2 times a week since day 10--thanks
a "flush" will never help a lockout issue in soil. it will make it worse 95% of the time.only flush in the event of a lock out issue