In depth video. I run two fluval filters 207 and 307 on my tank I alternate maintenance between the two every six weeks and they are always dirty wouldn’t leave it a year !!! Maybe I am ocd but especially when u have well stocked tank
First I use water from the tap to clean the inside of my cannister filters. I make sure the temperature is close, but never have had a crash. Rinse bio rings, and sponges and insides. So much easier to clean than a bucket. Also I use a good pre-filter sponge that I clean weekly.