I never used one. The only info I can share is I have set this same tank up 3 times with the same skimmer. It is a reef octopus 110. I originally bought this skimmer new with the old otp pump. I dropped mine and got a used one with the aqua trance pump. This time I went to my local fish store cuz the impeller broke on the second pump. I was interested in a new skimmer just because. The lfs owner who sells both the NYOS and reef octopus. “ He said why would you want to switch the reef octopus is a beast”