Hey guys, so I've done a bit of research. 29g tank is cycling. I can be as patient as I need so I have time. I don't have room, nor do I want to go buy another tank for it, but I'm wondering about an ATO. I'm renting the house I'm in so I don't have a source of RO water. I've been looking at these smaller "counter top" units that I can connect when needed (I don't have a sink in the garage -_-). Without getting into too much detail, what all is involved in an ATO? Can I just use a 5 gal bucket under the tank? Do I need rocks or lights in it? How complicated and expensive is it? Does it need to hook up to the canister filter I have? I searched the forums and couldn't find any specific answers to my question. Thanks!