09-05-2006, 05:44 PM
Join Date: Nov 2005
Location: South Central Idaho, USA
iTrader Positive Rating: 100%
I just picked up a 20 lb cylinder today. If you're worried about weight, it's certainly heavy - not so much that you can't move it, but a trip up 3 flights of stairs would get old. An aluminum tank would be better if you can find one.
From what I've been told, gas suppliers keep 20 lb cylinders in their inventory regularly, but 10 lb tanks can be hard to find. If your place refills the tanks, then it's no issue, but if they only exchange tanks you might have a harder time finding a 10 lb tank in-stock.
My 5 lb tank lasts >6 months on my 46g aquarium (on 10 hours per day). I opted for a 20 lb tank for the 180g tank to stretch out time between changes.
My cabinet is almost 29" high inside. The 20 lb tank with regulator will just barely fit. Keep that in mind too.