Hi guys just trying to get some opinions on my hydro setup I'm currently running a big boy systems from HTG supply after I flood and drain my system there's a little over an inch of water left over, I'm wonder if there suppose to be water left over? If so are my roots suppose to touch that water? Should I put small airstones in all 12 buckets so the left over water isn't stagnant? Is the water left over ok because I feed every 3 to 4 hours? Thanks.