Filter media!

[Asianleful]

get some pot scubbies. others have posted the links to get them

I can get pot scrubbies but to fill up a 110 gallon tub, it's going to be pretty expensive.

 

[kendragon]

The original manufacturer is Spirex out of UK. About ten years ago the mold was sold to my buddy in the US. He started manufacturing and selling the chambers with the ribbon for koi ponds. I believe they are still available today but not very popular. I purchased the first sets manufactured in the US. As I stated this did not work well for my expensive koi collection. I believe it works in the UK due to their climate but maybe not.
Filtering a couple of goldfish in a pond should be no problem. Wait till you stock it with monsterfish.
Chamber for sale!

 

[Asianleful]

The original manufacturer is Spirex out of UK. About ten years ago the mold was sold to my buddy in the US. He started manufacturing and selling the chambers with the ribbon for koi ponds. I believe they are still available today but not very popular. I purchased the first sets manufactured in the US. As I stated this did not work well for my expensive koi collection. I believe it works in the UK due to their climate but maybe not.
Filtering a couple of goldfish in a pond should be no problem. Wait till you stock it with monsterfish.
Chamber for sale!
View attachment 700695

I don't have that many fish in my pond so I think it will do.