I bought this after a long search for a wavemaker for my 20 long reef tank. I was a little skeptical after just finding a few reviews and videos online but decided to give it a try. It was perhaps one of the best purchases I've ever made. I used to have a Koralia Nano which provides flow through the tank. This increases the current almost 4 times and my corals immediately started to swell and grow much faster over the next few weeks. The built-in controller starts the pump in the following sequence: 50% power for 5 seconds, 75% power for 5 seconds, then 100% power for 5 seconds, all in one direction. After a pause of 5 seconds, the sequence starts backwards again. The amount of random flow generated by this little thing quickly cleared all of the debris from my sand and eliminated any dead spots. A slight hum can be heard at peak power. However, my aquarium is in my bedroom and the whining is not so loud that it is difficult for me to fall asleep. I say to everyone who thinks about it: Go for it! I think you'll be very surprised at the difference it makes. It incredibly mimics the natural environment of a reef and the coral and livestock really thrive on it. I think it's perfect for my size 20, but it would still go well with a size 29. Give him a chance!
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