Add sponge to HOB filter?

[Glenn407]

I have a Marineland canister still going strong plus 35 years I think and also a HOB filter with two Bio Wheels. I noticed that under the bio wheels there are large empty spaces after the cartridge filters. Would I gain any additional biological filtration by adding some sort of sponge filters in that empty spot that is essentially doing nothing?

 

[Fishmanic]

I stopped using the filter cartridges. Instead I stripped the filter material off the cartridge frame and using twist ties, I secured black filter sponge and filter floss cut to size to the cartridge frame. I change out the floss and squeeze out the sponge in tank water every 3rd of 4th week. Saves $$ compared to buying the cartridges. You can buy a large roll of floss very cheaply on Amazon.

And with all the money you save, you can become a supporting member of TFF.

https://www.fishforums.net/account/upgrades

 

[connorlindeman]

I stopped using the filter cartridges. Instead I stripped the filter material off the cartridge frame and using twist ties, I secured black filter sponge and filter floss cut to size to the cartridge frame. I change out the floss and squeeze out the sponge in tank water every 3rd of 4th week. Saves $$ compared to buying the cartridges. You can buy a large roll of floss very cheaply on Amazon.

And with all the money you save, you can become a supporting member of TFF.

https://www.fishforums.net/account/upgrades

Whether it's TOTM, FOTM, POTM, or supporting member you will never fail to make sure people know about it

 

[Fishmanic]

Whether it's TOTM, FOTM, POTM, or supporting member you will never fail to make sure people know about it

Oh yeah...that reminds me...be sure to vote in the Tank of the Month contest! Click link below to visit the poll:

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[Glenn407]

Oh yeah...that reminds me...be sure to vote in the Tank of the Month contest! Click link below to visit the poll:

Vote Now! - September 2022 Tank of the Month Contest (16 US Gal & Smaller)

POLL IS NOW CLOSED :big_boss: PLEASE VOTE! We have 10 awesome tanks entered in Fishforums' August 2022 Tank of the Month contest featuring tanks sized at 16 US gallons and smaller. View all the tanks and descriptions below and then go to poll at the top of this thread, click on your...

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Just did, back to my question...

 

[Slaphppy7]

If the tank is well established, the majority of your BB will be colonized elsewhere in the tank (substrate), so adding extra media to your filter(s) would be of negligible benefit for biofiltration, but may help with mechanical filtration

 

[Glenn407]

Got it. Thanks, no need I guess in my case.