I just bought a four stage reverse osmosis system but haven't ran it yet. It was a craigslist but and didn't come with directions. Imma check out youtube and the rest of the net for help but wanted to start a poll too. Can i just hook this thing to run into a 55 gal barrel or do i have to hook up the bladder too? The bladder is on the left of pic.

Last time i checked fish and corals lived in the ocean, so thats what i use to keep mine alive.