Mister timing

I have a fogger on order that wont be here for another week. In the mean time I was going to place a pump in my tote and then rig up some sort of sprayer. How long can I spray the roots for? My timer is also on order so I dont have a way of timing the misting. Can I just spray the roots for 12 or 24 hours as long as the spray only hits the bottom portion of the net basket? I read somewhere that the portion of the net basket that's exposed can be in contact with water 24hours as long as the upper portion of the basket and thus those roots, are dry.