I'm still doing the complicated procedure I described for the Catit. I have a large carton of carbon pellets and I'm no where close to using up all of the filter media I bought. One sheet could last me several years.
The only new trick I've learned is to make the filter media shorter than the reused frame so if/when it clogs, water will flow around the filter and it won't back up the system and pull water out of the dome making it overflow.
Cleaning the CatIt by hand seemed easier than the Fresh Flow, but it still has a lot of nooks that you need a toothbrush to clean. These areas do get polluted with algae if they aren't cleaned.

