the easiest way is to start your plants in rockwool seed plugs and place them in a seed starter unit which consists of, a heating mat,two trays(one for drainage and one to put your rockwool plugs in,and a humidity dome. once your plants get tall enough(about 6inches)you can then place them in your net pots all the way to the bottom and fill with hydroton. you could incorporate a drip system to your tanks but i find its very easy to over water them because between the drippers,the bubblers from below, and the fact that you cant see your rockwool because it is burried in hydroton