Hey Durban, are you familiar with the Hempy Bucket?
I'm no expert but as far as I know it's hands down the easiest way to do hydro... no pumps, no hoses, no nothing...just a bucket. I have a few plants going in it that I started a week ago and they're doing great!
Do a google search or if you can't find it post a reply and I'll find you some links.
There are no size restrictions or any other restrictions for that matter on a hempy bucket!