Clearer Water, Happier Fish
Couldn't load pickup availability
A simple way to boost your aquarium’s water quality.
This fish tank filter cotton gives your aquarium a clean, fresh feel by catching debris before it spreads. Its soft, multi‑layer build helps your filter work better and keeps your fish happy in clear, healthy water.
Easy to use with almost any aquarium setup.
✔ Helps improve water clarity fast
✔ Works with many filter types
✔ Great for tanks of different sizes
Trim to fit your filter, rinse as needed, and replace when it looks worn. Thickness is about 2.5 cm.
We are proud to offer duty-free, reliable, tracked shipping— delivered to your door in over 200 countries worldwide!
Below you can check our average shipping times:
Domestic USA Shipping: 2-9 business days
US & Canada: 7-18 days
Europe: 7-18 days
Europe Plus*: 8-30 days
Australia, New Zealand: 7-18 days
Hong Kong, Singapore: 7-18 days
Rest of the world: 8-30 days
*does not include processing times up to 2 business days or longer in peak periods
Primarily we ship out from fulfillment centers in the United States, Eastern Asia and Western Europe. If the item you've purchased is out of inventory in your nearest location, we'll send it directly from our production lines at the same delivery times as stated in our shipping section.
Will this fit my current fish tank filter?
Yes. You can trim the filter cotton to fit most aquarium filter shapes and sizes.
Is it safe for all fish?
Yes. The cotton is gentle and made for regular aquarium use with fish and other tank pets.
How often should I replace it?
Replace it when it becomes overly dirty or compacted so your filter keeps running smoothly.
The cotton helps remove debris so your aquarium looks fresh and bright.
Cleaner water supports your fish’s well‑being and natural behavior.
Helps reduce how often you need to do manual water changes.
You can cut it to size so it works with many filter designs.
Its multi‑layer build improves filtration for tanks big and small.
Made for cleaner water with less work
| Features | MK Aquarium | Knock-Offs |
|---|---|---|
| Basic debris filtration | ||
| Multi-layer filtering | ||
| Easy trim-to-fit design | ||
| Works with many tank sizes | ||
| Improves water clarity | ||
| Supports fish health | ||
| Soft structure for smooth flow | ||
| Stable thickness for performance | ||
| Great for hobbyists |
Cut it to the shape you need, place it inside your filter, and make sure water flows through it evenly.
Yes. Trim it down to the size you need and fit it into your small tank filter easily.
No. It simply catches debris and helps keep water looking clean.
Yes. It helps keep water clear, which supports healthy plant and fish balance.
If kept clean, it allows smooth water flow. Rinse it when it starts to look clogged.
Yes. Many hobbyists stack pieces for stronger filtration, depending on their tank needs.
Just rinse gently in tank water during routine care. Avoid harsh scrubbing.
It helps keep water cleaner, which may make algae easier to manage, but it doesn’t remove it directly.
Yes. You can trim the cotton to work with both types and more.
