Chemi-Pure is an excellent chemical filtration media that removes dissolved impurities, odors and dicolorations. In addition, it removes toxic heavy metals and keeps aquarium water crystal clear. Simple to use, it comes in it's own nylon bag. Helps keep your aquarium healthy by stabilizing pH and removing harmful ammonia and nitrate. Great for many applications, including power filters, canister filters, and wet/dry filters & sumps. Comprised of a mixture of activated carbon and ion exchange resins, Chemi-Pure can last up to six times as long as standard carbon.
One 5 oz. jar treats up to 20 gallons.
Keep Chemi-Pure package sealed until ready for use. Do not remove resin from bag. Rinse lightly and place bag in filter and flatten out as much as possible.
I use these for all of my tanks now. They get changed once every six months and really save money over using prefilled carbon. I will add floss to the filter to help catch the larger pieces of debris and rinse all of the filter contents once a month in treated water.
The only issue I have had is that the directions say to rinse lightly. If they are not rinsed enough, the tank water turns black.