Bests & Worsts Reviews from Amazon

Save Money and Keep Our Planet Green. Here's how to do it. Each of these little v-shaped filter cartridges is actually two plastic halves that snap together. Simply use a sharp kitchen knife to wedge between the two halves and work around the outside until the two halves come apart. Inside you will find two thin outer felt filters with a bunch of black rocks (activated charcoal) sandwiched in between. Keep the two felt filters but throw away the activated charcoal. Place the two felt filters and the two outer plastic halves in a bowl and soak in water with a splash of bleach added. Allow to soak for two hours. This kills all bacteria and mold that may have accumulated and helps clean the filter. Completely and throroughly rinse with water until no bleach smell. Allow to dry. Next go to Amazon, Wally World or your favorite pet supply store. In the fish and aquarium supply department you will find bulk activated charcoal for sale. You will recognize the black rocks and its cheap in loose bulk form. Next, just reassemble the filters with the felt on each side and pour the charcoal in one side, high enough to keep the felt pressed against the walls of the filter. Your done! I do this with about 6 filters at a time to save time and it allows me to change out my filters more frequently for cleaner water. Good Luck!