by high #s you mean 50+ so it would be impractical to do that with anything under??

I think i will settle with a $250 600W system, inexpensive/doesnt run up electric bill
High Tech Garden Supply

And one more thing(sry 4 all these questions) i decided to do an E&F (tray dimensions above) what GPH rating would be enough to pump water in and then out of the tray in 15min??the trays are 4" to 6" deep