BioFoam and Grid Whisper 30 40 60

Find the correct Bio-Foam® and grid for Whisper® 30, 40 and 60 filters when you shop Tetra's Whisper® filter parts.
Product No. 25994-00


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BioFoam & Grid for the Whisper 30, 40, and 60
BioFoam and Grid Whisper 30 40 60 is rated 3.7 out of 5 by 3.
Rated 1 out of 5 by from Customer service gurantee After calling and being told it will fit my filter it ends up being the wrong size
Date published: 2016-11-28
Rated 5 out of 5 by from Works with TopFinn 60!!!! I was very disappointed when I found that the TopFin 60 that came with the tank I bought from craigslist didn't have biological filters, however, I noticed that when I looked online for a replacement filter that the new tetra filters looked exactly like the TopFinn, which went out of business. Upon further research I discovered that TopFinn had been bought out by Tetra, and Tetra had designed a biological filter to fit a small space in the TopFinn filter and continue making that model under a different name and brand to save money. That means that if you own a TopFinn with no bio filter, you're in luck! Just pop two of these bad boys in there and you're good to go! I put mine in only a few weeks ago, and already my tank cycling is almost completed! Thank you Tetra!
Date published: 2013-11-20
Rated 5 out of 5 by from Excellent Products are high quality, prices are comparable and I cannot say enough good things about customer service. My order got lost in shipping so I wrote them and had a replacement order in my hands within three days.
Date published: 2013-09-30
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What exactly does this do, how does it improve tank conditions and how does it affect water flow?

Asked by: Slothvilorbust
This is our bio foam for our larger Legacy Whisper filters the 40 and 60. It offers a permanent surface area for beneficial bacteria which greatly increases the biological filtering capacity of the filter. It does not affect water flow at all. BREX
Answered by: BREX
Date published: 2017-02-04

i have a 55 gallons, what size of bio filter i can use?

Asked by: odrigue
If you have a Whisper 60, you would use the size large, which fits the 40 and 60, item number 25994. BREX
Answered by: BREX
Date published: 2015-09-16

Which bio foam grid will work for top fin 30?

I was given a filter but it didnt come with a bio grid so which bio grid will fit the top fin 30
Asked by: Alexis
The one in the link that you provided is the correct one. It states for Whisper 30, 40, and 60. BREX
Answered by: BREX
Date published: 2016-06-25

what does the biofoam do?

What is the purpose of the biofaom?
Asked by: leah5275
It is a permanent source of biological filtration where aerobic bacteria grow continuously. You only rinse it when it becomes clogged, and this will not dislodge or harm the bacteria, so when you throw your cartidge away once a month, this stays put, and keeps your biological filter intact. BREX
Answered by: BREX
Date published: 2016-04-30
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