Acrylic yarn for filter sponge in hob filter

Has anyone ever tried using acrylic yarn as filter sponge. I cut the blue filter from my filter cartridge and dumped out carbon. I used the black part of the filter cartridge as a fence to hold the yarn in the filter.

Grizleyguy said:

Has anyone ever tried using acrylic yarn as filter sponge. I cut the blue filter from my filter cartridge and dumped out carbon. I used the black part of the filter cartridge as a fence to hold the yarn in the filter.

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nope, but it is a cool idea!
what does your water look like? how many particles floating?

No particles in water except after feeding. Seems to work well so far

Grizleyguy said:

No particles in water except after feeding. Seems to work well so far

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cool!
what is the brand of yarn? some yarn has colors that will fall off and some leech stuff, and this seems to work really well

I use acrylic yarn for mops, for killies and rainbows to spawn in. I wouldn't use it for filtration, as it's too easy to bypass. One trick I have used (if this will fit in the filter you have) is to get rid of the replaceable slots completely, and cut humidifier sponge to fit. A filter that needs replacement cartridges is going to constantly lose its cycle (it will, however, pay off for the manufacturer). They are an inefficient system.
Sponges last 10 years and provide both biological and mechanical filtration.

The brand is red heart. I used off white and figure less chance of color leaching

Red heart is aquarium safe, in my experience.