I got a (very large) rubbermaid tub for my trimmings and young plants a week or two ago and shoved in an old heater and a fermentation co2 canister from Hagen.
Im really happy with it so far! :) My plants are certainly enjoying it, too. They were previously stunted from being in a small 5g.
The lights are normally not this awful, btw- I had a really great light but... it fell into the water.

What a terrifying mess that was! My roommate and I freaked out as it nearly arced a shock out! Gyagh! Bad day!
Working on getting new ones, though this set up isnt terrible. Theyre still growing quite well. Huh.
Anyway, pictures!
The set up:
(Its at least 10 gallons, I think closer to 15? Noooo idea!)
Stays about 72-76'F and has minimal filtration, but just enough to push the heater water around, lol.
Side view, sorry its fuzzy, its not 100% clear plastic:
Above view:
One of my happiest plants, not 100 sure what it is though!
Bubbles!
Not sure what Im gonna do with the plants. I might sell them at a local aquarium club or perhaps just to local stores.
I have a happy pond snail population (theyre enourmous...) and a few MTS in there and dose ferts and root tabs. :)
Post pics for progress later, so I can see changes!
(Comments, thoughts?)