Aquamaxx Hob 1.5 is a beast. I have the Tunze 9004 and the Aquamaxx and the Aquamaxx is a better skimmer. The Tunze is nice in that it does fit in one of my rear chambers on my JBJ 30 though. Looks + skimming ability = Tunze 9004. Pure skimming ability = Aquamaxx
T
remora skimmers are very good as well. Super easy to adjust. Dont need to turn them off when removing the cup to clean. Safe/pretty much flood proof etc...