I am not going to use net pots. I am going to use lava rocks coctek and hydrotron as the medium and sprout it outa one of those and just let it grow. Isn't that what you said in this

If you are putting lava rock or grow rocks in the buckets why do you need the net pots? The idea of the net pot is to hold the grow medium in place and let the roots grow through out it. Don't forget with that type of system you need to have a net pot or someting else to hold the bucket up out of the water sitting in the botton of your res bucket. Don't forget the air supply in each res bucket.