Actually, Laing USA does not use the same naming convention (they use 3.1/3.2) as Laing Europe (they also don't get along with each other the last time I heard). DDC1+ Ultra= 18W (or 3.2), DDC-1T Pro= 10W (or 3.1). I've seen some shops that have typo's in the listing headers (like Aqua-PC's) so look through the pump specs carefully to make sure which it is.