[Leighkai76]

I put a new canister filter on my 45 gal 2 weeks ago and have been running the old HOB filter along with it. At what point can I remove the HOB?

 

[littletim]

I just did the same thing yesterday and I'm going to keep my hob on for maybe a week. did you add any media from the old filter to the new filter? I imagine that'd help but either way 2 weeks seems like more than long enough

 

[Leighkai76]

I did float some sponges in the old filter for a few days and then transfer them to the new one, not sure if that did anything or not.

 

[Wwh2694]

Weeks to months depends on your tank and temperature. Not all tanks are the same.