Your missing the point... good bacteria grow on all surfaces of a filter.... I have an AQ30 and AQ20 on my 20 gallon. I swap out the purgien but that is all I do to my filters. The one time I did simply remove the media and rinse the filter out with tank water and put the media back in, I had a huge mini cycle... Listen
Isn't it at least suggested to open up the filter and remove any debris and clean the intake? And check out the pump?
I just meant open it up and remove any debris, not like try to make it look like new or anything. Or should I just never clean it?
Then again, I never touch the setup in my Evolve 4. I basically have the same media setup in it, haven't touched it in months.