This is a Red Sea Reefwave 25 wave maker gyre pump. I used it around a year in a Red Sea Reefer 250 aquarium setup. The Reefer 250 is 36” long and it was perfect. It works great, works with the reef beat app great. Hasn’t give me a single issue. It does still have a little algae dried on it. I took down the aquarium due to a life changing event and am going to get out of the hobby for a while. When I go back it will be with a larger aquarium and this one will be to small. Please see photos and message with any questions.