BIO-Rings do not require replacement unless damaged or destroyed. In the event of
excessive buildup, you may gently rinse with water from an established aquarium, if
desired. Do not clean with soaps or abrasives and never rinse with tap water.
DISCLAIMER: The results described on the testimonials on this site, are the individual experiences and personal opinions of those who have purchased and used the products. These testimonials are not intended to make any claims that the products can be used to diagnose, treat, mitigate, cure or prevent any disease or medical condition.