Instruct: Classify a review into positive or negative sentiment.
Query: Best look at other filters before you buy this one

I've owned a 55 gallon tank for over 10 years. By far, this has been the WORST filter I ever had. The constant filling and releasing of water in this filter is noisy to say the least. That is, if you can even position the cap inside the filter to get the thing working properly. It took me hours of fiddling to get this filter to work correctly.The additional heating source inside of the filter itself also turned into a nightmare. If you have frequent power shortages, or lose power from storms, or any other reason, this is not the filter for you. My heating component MELTED the plastic casing around it when our power failed, and the water stopped cycling through the tank. As no one was home at the time, we're lucky it didn't start a fire. Then by the time anyone noticed that the filter wasn't running, it have been a whole night. Not only was the tank water cloudy from going unfiltered, it was also cold.I don't reccomend this filter at all.