The hot tub filter or spa filters is probably the most important part of your system. It is always working to remove unwanted materials from the water, such as bacteria, hair, leaves, bugs, and other impurities. It should be properly maintained for the best performance.
The best spa filter systems work efficiently and require a low amount of maintenance. The most commonly-used system for spas and hot tubs are cartridge filters. These devices work by pushing the water through pleated or folded mesh-like material.
Use common sense when deciding how often the filter should be cleaned or the cartridge changed. If the system is not working try cleaning it. Just like cleaning the hot tub or spa, cleaners that are not specifically designed for filters should not be used. If the unit does not seem to get any cleaner it is best to change the cartridge. Regardless of its performance, you should replace the cartridge at the recommended intervals specified in the user’s guide.