Oh you're right. It will. Any idea if it's any good? No reviews on Marine Depot.
Some people on Nano-Reefs like it.
The one complaint I can see, is that it's VERY noticeable. It has to be very far out of the water, and a white skimmer with a black tank, stand, light fixture, and light, is going to be apparent.
Besides regular (perhaps more frequent) water changes and emptying of the cup, is there any other downside to getting the Hydor? I love the reviews.