It has a surface, so it will "work" in the sense that it will provide space for nitrifying bacteria to grow. If your current bio media is working fine I'd sell the K1 and stick with that, in a canister filter surface area is surface area, regardless of whether it is K1, bio rings, pot scrubbies or GI Joes.
If you want to use the K1 as it is intended you'll need to build a proper filter/reactor for it so it can "boil".