Bio Wheel Question

[kinderpond]

I am pretty experienced with aquariums...have had several for a good 6 years now. However, my DH thinks I'm crazy when I tell him that you do not need to replace the Bio Wheel in an aquarium. Our two goldfish recently died, and we have decided to switch to a tropical freshwater setup. DH is thinking you need to change the Bio Wheel between fish setups, but I have changed fish (from comets to goldfish) without any problems. Anyone have any ideas that I can use to convince him we DO NOT need to change the Bio Wheel?

 

[Orion]

There is just no reason to. If you change them you will loose the majority of good bacteria that keep the tank cycled. The only reason I would change them is if the previous fish had a disease, in which case the entire tank would need to be broken down to clean everything properly.