Here’s a video on how I clean my bio filter that i built a while back.
I remove everything from the filter and clean up all the sponges and scrubbies with a hose. I then clean 50-80% of the bio balls, not all so that there is a colony of beneficial bacteria to start off a new colony. I then dump out all of the water in the container and re-assemble the scrubbies, sponges, bio balls, mesh, rocks, etc. in it’s place. DO NOT clean out the container/canister/trashcan, this way there’s some beneficial bacteria to start off a new colony. If you do clean it, don’t worry. A new colony will start, but it will take some time. You could also add in some beneficial bacteria that are sold in bottles. Finally I turn on the pump and let the filter do it’s thing. As an extra natural filter I add plants to the top of the container. This filters the water more and adds beauty to the pond. Thanks for watching! And For the Love Of Goldfish!
This is my friend’s channel if you would like to check it out. He gave me a shout out in one of his videos and i wanted to return the love and kindness! Lots of informative info on koi and goldfish
URL to his channel: https://www.youtube.com/user/giovannicarlobagayas
This is the video where he gave me a shout out:
If you have any questions feel free to ask me!
Kitty Loves Tofu