glad to help, but I don't really think what I am doing with these is an actual Technique or not. Never really heard of it done quite like that. Seems to be working, and a really inexpensive way to get your feet wet (pun intended). buck for the bucket at dollar tree, 5 bucks for the Grodan block, 1 1/2 inches in bottom of clay pebbles -1 buck. They are doing well, so I have a dozen now in a 3ftx5ft.