There is a growing need for affordable wave makers to improve aquarium and pond ecosystems and protect expensive coral, fish and other water life and exotic investments. Most wave makers currently require electricity and are expensive. Until now attempts at inexpensive mechanical options have not been optimally designed or manufactured. Small, compact, inexpensive, and manufactured in the USA, SCWD does not use electricity, generate heat, or clutter your aquarium, pond, or garden environments. Get the clutter out of your aquarium install SCWD on the outside of your tank.