10 Gal - with Lid, Light and Filter.\n\nThat is something I found on Craigslist. They have 5 of them.\n\n I was thinking of getting 2. 1 for my fuge and one for sick/acclimation use.\n\nMy question is this. If it has a filter and light can I use the filter and pack it with carbon and leave it on the fuge for a benefit of some sort?\n\nHere is a little drawing of how I could set it up. Any thoughts.\n\nThe pipes won't be as long as they may appear and it is not to scale. Just showing the flow. Oh and I left out the fuge light and I may just may put some sand in the fuge.