This is the way I do it. I have one Ac 110 on a 60 gallon I use the standard sponge, a layer of quilt bating and then about 2 inches or more of Ceramic rings. About once a month I fill a bucket with tank water and unplug the filter and get all the media in the bucket. I DO NOT rinse out the plastic HOB I only rinse the sponge in the tank water replace the quilt bating and rinse the ceramic rings also in the tank water....I put all media back in the HOB fill it with tank water and start it up. About once a year I take them all the way apart and rise and clean the actual plastic HOB and impeller.