welding supplies shops may sell you a filled 10# tank, then do exchanges for cheap. Best to check locally for tanks.
Member AGA, HAS, NASH
110G, 10 adult discus, barebottom with plants on wood
58G, 3 adult discus, barebottom with plants on wood
59G thickly planted tanks, rummey nose tetras, kuhlies
300G goldfish pond outside