I've had this for over a month and I still have no complaints. I've always wanted a Wave/Circle Maker but still couldn't afford one. It's quite strong like the others, I also had to turn the intensity down as my whole aquarium was rocking on the stand and my corals looked like they were caught in a storm. I had a spark issue as others have mentioned, but if you plug the controller into the power cord first before plugging it into the power supply it should be fine.
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