Review on Enhance Your Turtle's Habitat with (3 Pack) Zoo Med Turtle Clean 15 Activated Carbon Inserts by Rodney Handy

Exactly what the manufacturer said. recommends replacement. Pretty pricey when you need one every month, but I haven't noticed other manufacturers selling similar sized charcoal pellets. The "Filter" itself is a 4-level system; The packet of charcoal pellets is only stage 3. I clean everything often and to save money I rinse the bag of charcoal with water and REUSE it a second time. I hope the turtle doesn't mind.