Cheap 4” filter cup alternative???

[poplalud]

While setting up my UNS R75, I saw something and had a thought. Has anyone tried this filled with polyfill (holes needed obviously). They fit almost perfect with the splash guard in place.

 

[Dread Pirate Dave]

While setting up my UNS R75, I saw something and had a thought. Has anyone tried this filled with polyfill (holes needed obviously). They fit almost perfect with the splash guard in place.

Maybe something like this?

4" NOSOK Filter Sock No Sock Replacement Silencer Cup - VCA

Shop The Best Saltwater Aquarium Equipment & Supplies at Saltwater Aquarium. We Carry Everything you will Need for your Fish Tank.

www.saltwateraquarium.com

 

[poplalud]

Those exist for sure and likely work better, but I might give the $0.04 option a try. Lol