it`s been MY experience in a N.F.T. system to run the water all the time, but i`ve seen other similar systems run their solution through the tubes 15 minutes to one half hour every hour or 2.
either way would work, but i preffered to have the solution run 24/7 with solution changes every week, and system flush every month to wash out accumulated fert salts on inside of res. and tubes.


hope this helps you out
notanovice Reviewed by notanovice on . mental block about rock wool cubes are drving me crazy I took pictures and they didn't come out well enough to show anything. Thanks to notanovice for helping, at least now I know how to do it. I think that I solved my root rot problem and I think it was due to the rock wool deteriorating and contaminating my system. I follow instructions that I have gotten from all the great people who have given me advise. When I soak the cubes in 4.5 ph water for 24 hours, they seem soggy and not easy to work with when either putting in a clone or a seed. Rating: 5