Tom Rapids has updated their Pro series filter with auto top off system. Based off of the old design this new version has a cleaner, more slick look then the outdated, outgoing model. Features don’t change much but do offer a lot for an aquarium such as an advanced filtration system with built-in venturi pump protein skimmer, high capacity aquarium filtration system that is perfect for limited space areas and a combination aquarium canister filter, wet/dry filter, and protein skimmer built into one space saving unit. Most of users are happy with some sort of live rock filtration with water flow, but if you are up to doing maintenance on this filter it looks like a great deal, including the auto top off system. Marine Depot has this new item in stock for $329.99.