Hey are you asking about the recirculating drip in soil system? I explain it a little more in this post
http://www.rollitup.org/grow-journals/543138-recirculating-drip-soil.html
Ask away and I will try and explain it the best I can.
http://www.rollitup.org/grow-journals/543138-recirculating-drip-soil.html
Ask away and I will try and explain it the best I can.