If you can build a big sturdy shelf above the tank then you could do a constant flood media bed or a raft bed above.
Then of course you need lighting (go to the artificial lighting group to get advice on that.)
I will recommend an emergency blanket curtain around the plant growing space to contain the light somewhat being that it is in the middle of the house and bright grow lights might make it less comfortable. The mylar emergency blankets you can get from the camping section of the department stores (k-mart where ever) are much cheaper than the mylar the hydroponics shops will sell and it's kinda like putting sunglasses around the plant growing space (that will also bounce light back to the plants) instead of needing to wear them yourself.
Oh, and a small fan in the plant growing space is also a good idea.