built something similar. only larger scale so far seems to be working great for sea of green kinda like a giant bubbler. used an 18 gallon tub two high output airpumps and baskets filled with hydroton. because they are newer plants, the water level is about an inch up the basket. once the roots have extended down a couple inches i will let the water level fall about 6 inches and add a few nebulizers to vaporize some of the nutrient solution to maximize on my nutrient/oxygen levels. bubbles and vapor mixed should produce well.:smokin: