I purchased 2 xp3's when Petsmart was running their special ($75.00 each). I was also worried about the noise after reading these reviews. After setting up the 2 I had bought I noticed that these filters hardly make any noise at all!! Actually I have to put my ear up to the filters to hear them running. These filters are great!! Easy to clean, lots of room for media, quite, hold their syphon, and priced very well.
I was in the car parts business for 10 years. So believe me when I say that you can purchase a Mercedes Benz and get a lemon too.
Equipment: 55g, 3x 9watt tt uv, 2-xp3's, pressurized co2, inline co2 reactor, 216 watt catalina t5 fixture, milwaukee ph controller, 300 watt hydor inline heater, aqua soil
Filstar Pimp #100