
First, your buyer doesn't get the 200 series. It's loud. I could hear mine whining and moaning 20 feet away so I now switched to the 300 series to gauge the pros and cons. from 330, pro : This version is completely silent, I could stand a few centimeters above it, walk at 70% and not hear the sound! If you have a peninsula tank like mine this is the power head for you with all the different setups. It carries a ton of clean water to the opposite end of the tank (and I have 180g), revolves around sweeping detritus along its path and providing rippled surface water for gas exchange and pH boost is clearly worth the money. Cons: It is a magnet for algae growth and requires regular maintenance. definitely outweighs the disadvantages and still deserves 5 stars my absolute recommendation for the maxpect gyre 300 series

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