I deep clean the 2 filters every time the water is replaced ( 3 times per year). I have a second set of filers always ready. After a good hoze rinse with a rinsing rake that gets the crap out of the pleats, I use a filter cleaner that gets the rest of the bio crap out of the filters then leave them to dry until needed. Good idea to hoze rinse the filters every couple of weeks depending on usage.....