look for chaeto...i have it in my fuge and its great...i know that chaeto is very easy, drop it in your fuge, turn on the light and let it go...also, if you need to turn the light of this also is a good plant b/c it takes longer for it to go sexual like other plants and you dont want that either! After a while it will fill up your fuge and you'll trim it back and give it to others or you LFS for credit!
hope this helps!