Review on 🐠 High-Performance Flexzion Submersible Wave Maker with Magnetic Mount, Adjustable Flow Rate - Perfect for Aquarium Fish, Marine Coral Reef Tank, Pools - Suitable for Fresh & Saltwater - 1600Gph by Laura Thomas

These are great if you just want the best possible flow for the money. 100 GPH for the buck is about the best you can go and it has a magnetic mount instead of a suction cup - much better and just the icing on the cake. Swimming pool. I just bought 2 more, one for my reef mixing barrel and one for the pool. I love that it has an adjustable sleeve to reduce flow if needed, but I run it at full power. The only problem, as others have mentioned, is that the mounting collar doesn't have much friction on the pump body, allowing it to move and change direction over time. Some even said he was completely out of the loop, but I've never experienced that. A simple solution is to wrap the elastic around the midline of the body. This will keep it in place and not affect the flow.