I have several filter canisters, at home, can someone
purchase just the media and attempt to make their own
Kold Ster-il® System?

No! First, the Kold Ster-il® System is a U.S. Patented Product. Second, the filter media are subject to separate U.S. Patents. Poly-Bio-Marine, Inc.® will not allow it's patented media nor patented internal media retainers to be used in any other systems or canisters without a license and proof of product liability insurance. Finally, the addition of the Kold Ster-il's three filter media to any other filter canisters ---- is a waste of time and money. Our Patented filter media will not function in any other canister system ---- without the Patented (Filter Media) Retainer Assemblies. Poly-Bio-Marine, Inc.® did the research & development before applying for the Patent on the entire system and as such is protected under federal laws from: reverse engineering, usage of media in any other nonlicensed systems, and any pseudodesigns, copies, clones that attempt to make similar performance claims. The Kold Ster-il® System is the only system using 10" canister capable of 14.0 liters per minute and meeting Japan's 46 item drinking water certification.