I'm currently building a Reefer 350 and had planned to use a Tunze ATO because they seem to be respected as very safe and reliable. I'm now considering using the stock ATO because of its simplicity - gravity fed, no pumps, simple float valve. Plus, I don't think the ATO reservoir is big enough to flood my sump even if the float valve fails.
What's everyone using and why?
What's everyone using and why?