Zoo Med Replacement Mechanical and Biological Sponges #318 is a combo pack of replacement sponges for use with Zoo Med's TC-20 Turtle Clean 318 Filter or MC-20 Micro Clean 316 Filter. These highly effective filtration sponges help keep your water clean and healthy by hitting both points of filtration.
Ideal for aquatic and tropical environments. 1-year manufacturer warranty.
Q: How often should I change the sponge(s)?
A: The sponge(s) can be rinsed monthly but only need to be changed if they cannot be cleaned or if they start to break down.