Seems Dakar is using the SEIOS 1500's,i use the 820's and have been happy with it.They provide alot of flow while being able to disperse it so its not too concentrated.My only complaint is there bulky size but they can always be hidden behind the LR/aquascape.For $65,you cant beat a 1500gph PH.A pair of them is what i will probably end up using in my upcoming 75 gal project.