I hope to soon convert a 29 gallon tank I have to a sump for my 55 gallon display tank. I'm overwhelmed by the number of return pumps available in terms of brand names and configurations. It also seems both the manufacturers and retailers go out of their way to [U]not[/U] suggest what applications a particular pump are most suited for. I'm sure they don't want to limit themselves or incur any liability if someone picks the wrong one. \n \nAre there a couple brands or types that are considered "standards" in the hobby for sump applications?