so ive decided i want to get a new tank. im starting a new job and will have extra income. im thinking either getting another 20L for my current set up so have 2 20L vs a 20L and a 10 like i have now. or maybe get about a 30gallon and a stand. maybe a 30 breeder or a 26g bow front. anyway im looking for imput. so should i go for a second 20 Long which would be heaper since i wont need a new stand for it. or should i get a larger stand alone aquarium? input please 