6 Pack Replacement Small Size Cartridges for Tetra Whisper Small Fish Tanks Filter; Refilled Filter Cartridges S Size for Aquarium Kits 3-10 Gallons Betta Fish Tank Kit
Original price was: $15.99.$14.99Current price is: $14.99.
Price: $15.99 - $14.99
(as of Oct 26, 2025 06:04:52 UTC – Details)
Perfect replacement for Tetra Small Filter Cartridges S Size; works for 3~10 gallons small fish tank filters; Measures 4″ x 2.2″ (L x W), fits many brands of Small HOB filters. Please check compatibility before purchasing.
In a three-layer filtration design, double-layer microfiber cotton can effectively absorb solid impurities such as debris and fish waste, and the inner layer of activated carbon can absorb odor and discoloration, reduce fishy smell, improve yellow water, and improve water quality. Clearwater provides you with a better fish-viewing effect.
Convenient to replace and install, and even no need to get your hands or fingers wet
Replace the filter cartridge every 3 to 4 weeks if there is reduced water flow.
6/12 Pack – Continuous, high-efficiency, low-cost, replacement Refills
Perfect replacement for Tetra Small Filter Cartridges S Size; works for 3~10 gallons small fish tank filters; Measures 4″ x 2.2″ (L x W), fits many brands of Small HOB filters. Please check compatibility before purchasing.
In a three-layer filtration design, double-layer microfiber cotton can effectively absorb solid impurities such as debris, and fish waste; and the inner layer of activated carbon can absorb odor and discoloration, reduce fishy smell, improve yellow water, and improve water quality. Clearwater provides you with a better fish-viewing effect.
Convenient to replace and install, and even no need to get your hands or even fingers wet
Replace the filter cartridge every 3 to 4 weeks if there is reduced water flow.
6 Pack – 1/2 Year Supply, Continuous, high-efficiency, low-cost, replacement Refills
8 reviews for 6 Pack Replacement Small Size Cartridges for Tetra Whisper Small Fish Tanks Filter; Refilled Filter Cartridges S Size for Aquarium Kits 3-10 Gallons Betta Fish Tank Kit
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Original price was: $15.99.$14.99Current price is: $14.99.
Jessica Carey –
Clear water!
My fish tank is clearer than it was before! I get more time between having to clean the thank than before. I was cleaning it every five days previously because it was so cloudy. Been over a week and the water is just starting to look like it needs to be cleaned!
Candyoinky –
In the picture it looks bigger than it really is! Make sure to look at the inches instead!
I was really scared it wasnât gonna be the right size since the picture itâs looks more bigger than the size that I have but it was perfect!
Victoria Banks –
Fish
Great item, received quickly
Brianna –
Great value
Great value. They worked well and fit in our standard fish tank from petsmart/walmart.
Tracey AZ –
Small 3 gallon filters
This fit in the small 3 galloon ranks that we have for our kids betta fish. As the photo shows they are lacking the black plastic around the filter but it does jot impact the filters. Good buy!
Suzanne –
Fish filters
Yea isn’t the only that works in my three tanks
Patrick McQuellon –
Good price.
Great filters!
dragonmermaid –
Good cheap charcoal bags for nano tank filter
Carbon filters give your tank water that crystal clear look. You are advised to swap them out every month, but you don’t have to do that unless you have a lot of fish. But for a betta fish tank, you can get away with using one filter for half a year. So getting a big pack like this is very economical. These filters work just as well as filter bags I get for 5x the price.