So here's the question guys. I run a 3*6 flood and drain table. My previous grows I use the 6 in rockwool until the roots are busting out the bottom, then I put a couple inch layer of hydroton in the tables and backfill around the wool. This method has worked well for me in the past, however I don't see many people running their set ups like mine. Is it inefficient like this? I start at one flood daily in early veg then bump up as I find necessary throughout the grow. Thanks for any input.