Just added the Reef Fanatic Level Controller w/2 Float Switches to the website:
"Automate your aquarium water top off with our water level controller. Since safety is our number one concern, we include two float switch sensors with our water level controller. The first float switch sensor triggers the feed pump (sold separately) to maintain the desire water level. The second float switch sensor ensures dependability and offers overflow protection. Our water level controller can also be used to protect pump from run dry."
Features:
Two detachable float switch sensors
Low power consumption: 2 Watts
Control Power Output: Maximum 2 Amps
See user's manual for different setup options
http://www.reeffanatic.com/products/...ol/ct_rflc.pdf http://diyreef.com/shop/product_info...roducts_id=296