Clean your filters ONLY as needed. The skimmer mat should only need to be cleaned about once a month, at the most. The skimmer basket/net, however, should be dumped weekly, or more often if there's a lot of debris falling in the pond. Some customers have trees over their pond, which necessitates dumping that basket/net a little more often. Our dust storms and haboobs can also be a nuisance during monsoon season.
Your biological filter, however, should ONLY be cleaned if the flow of water is being restricted due to an accumulation of debris, but most of the time should only require cleaning once a year during the annual cleaning process in the spring.
If you feel you must clean your biological filter, do NOT over-clean it. It is only necessary to remove the debris that are restricting flow. Over-cleaning the filter can destroy the bacteria (the "good guys") that have colonized on the media, doing damage to the healthy ecosystem and causing you more work to get it back in balance.
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Barbi Holdeman, co-owner of The Pond Gnome, enjoys sharing their 17+ years of education & experience with you! She writes about Phoenix Ecosystem Pond Installation, Pond Maintenance, Wildlife around the Pond, Koi and Goldfish in the Pond, and the Pond Lifestyle. If you enjoy what she writes, please share it!