[steve the plumb]

Its about a 1" wave.It doesn't affect my sump at all.The water goes back and forth.I would have to cut my overflow teeth to lower them so I could lower the water level and then make a stronger wave.I am happy with it.I have read that it shortens the lifespan of a glass tank but I don't know about acrylic.I can take more vids if you like.The unit does make a bit of noise but its not bad.It has a photo cell so it shuts off at night.You can also use the feed button to stop it to feed the fish.I think you can also add a tunze pump to the controller.The skimmer is performing the same.It would be nice if my overflow teeth were lower then I could make a 2" ,or even bigger wave.