You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
Search results
The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
No need to ever change the bio rings. Make sure you rinse them once in a while using the same aquarium water. I've kept the same bio ring in all 3 of our canister filters for the last 4 years with no problems.