10 Best Filter Media for Saltwater Aquarium 2026: According to Reviews | Chewy

The 10 Best Filter Media for Saltwater Aquarium

A thriving saltwater aquarium depends on more than what you see. The quality of the water makes a critical difference in the health of your tank. The best filter medias for saltwater help maintain clarity and balance by making filtering easier and more efficient. Look for options that reduce cleaning time and promote a healthy system that supports thriving marine life. Below, you'll find today's best-selling and top-rated saltwater aquarium filter medias that Chewy pet parents, like you, love. We update this list every week, so you can be sure you're getting the timeliest product recommendations available.

Our Top Picks

How we created this filter medium list

We leveraged input from our veterinarians and artificial intelligence to identify key considerations to help you find the best filter media for saltwater aquarium.
We scanned thousands of customer reviews and ratings and scored each product based on its performance against each of the key considerations. We then considered how popular a product is with Chewy customers and combined that with its key consideration scores to create the list of the best filter media for saltwater aquaria.

Key filter medium considerations

Compatibility

Durability

Ease of Use

Filtration Efficiency

1
Marineland Black Diamond Activated Carbon Filter Media, 22-oz jar
Marineland Black Diamond Activated Carbon Filter Media, 22-oz jar
Marineland Black Diamond Activated Carbon Filter Media, 22-oz jar
Marineland Black Diamond Activated Carbon Filter Media, 22-oz jar
Marineland Black Diamond Activated Carbon Filter Media, 22-oz jar
Marineland Black Diamond Activated Carbon Filter Media, 22-oz jar

Marineland Black Diamond Activated Carbon Filter Media, 22-oz jar

Rated 4.8 out of 5 stars
257
$9.99 Chewy Price
($0.46/oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.8/5
Excellent

Durability

4.7/5
Excellent

Ease of Use

4.7/5
Excellent

Filtration Efficiency

4.6/5
Excellent

Is this filter medium right for my pet?

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Marine Fish
2
Tetra Large Aquarium Carbon Filter, 4 count
Tetra Large Aquarium Carbon Filter, 4 count
Tetra Large Aquarium Carbon Filter, 4 count
Tetra Large Aquarium Carbon Filter, 4 count
Tetra Large Aquarium Carbon Filter, 4 count
Tetra Large Aquarium Carbon Filter, 4 count
Tetra Large Aquarium Carbon Filter, 4 count

Tetra Large Aquarium Carbon Filter, 4 count

Rated 4.8 out of 5 stars
165
$10.77 Chewy Price
($2.70/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.6/5
Excellent

Durability

4.6/5
Excellent

Ease of Use

4.7/5
Excellent

Filtration Efficiency

4.7/5
Excellent

Is this filter medium right for my pet?

Material

Foam

Fish Type

Tropical Freshwater, Marine Fish
3
AquaClear 50 Active Carbon Insert, 3 count
AquaClear 50 Active Carbon Insert, 3 count
AquaClear 50 Active Carbon Insert, 3 count
AquaClear 50 Active Carbon Insert, 3 count

AquaClear 50 Active Carbon Insert, 3 count

Rated 4.8 out of 5 stars
103
$7.98 Chewy Price
($2.66/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.5/5
Great

Durability

4.5/5
Great

Ease of Use

4.5/5
Great

Filtration Efficiency

4.8/5
Excellent

Is this filter medium right for my pet?

Material

Mesh, Synthetic Fabric

Aquarium Type

Saltwater, Freshwater

Fish Type

Tropical Freshwater, Marine Fish
4
Underwater Treasures Seapora Filter Floss, 20-sq ft
Underwater Treasures Seapora Filter Floss, 20-sq ft

Underwater Treasures Seapora Filter Floss, 20-sq ft

Rated 4.8 out of 5 stars
54
$15.99 Chewy Price
($15.99/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.1/5
Great

Durability

4.4/5
Great

Ease of Use

4.5/5
Great

Filtration Efficiency

4.2/5
Great

Is this filter medium right for my pet?

Aquarium Type

Freshwater

Fish Type

Tropical Freshwater, Marine Fish
5
Boyd Chemi-pure Elite All-In-One Chemical Filtration Media, 11.74-oz jar, Bulk 6-pack

Boyd Chemi-pure Elite All-In-One Chemical Filtration Media, 11.74-oz jar, Bulk 6-pack

Rated 4.6 out of 5 stars
69
$86.25 Chewy Price
($1.23/oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.8/5
Excellent

Durability

4.7/5
Excellent

Ease of Use

4.7/5
Excellent

Filtration Efficiency

4.7/5
Excellent

Is this filter medium right for my pet?

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater
6
Fluval Spec Carbon Bags Filter Media, 3-pack
Fluval Spec Carbon Bags Filter Media, 3-pack
Fluval Spec Carbon Bags Filter Media, 3-pack

Fluval Spec Carbon Bags Filter Media, 3-pack

Rated 4.7 out of 5 stars
72
$4.48 Chewy Price
($1.50/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.6/5
Excellent

Durability

4.4/5
Great

Ease of Use

4.6/5
Excellent

Filtration Efficiency

4.6/5
Excellent

Is this filter medium right for my pet?

Material

Mesh, Synthetic Fabric

Aquarium Type

Saltwater, Freshwater

Fish Type

Tropical Freshwater
7
SunGrow Activated Carbon Charcoal Pellets Aquarium Filtration, Cat Litter Box & Water Fountain Deodorizer Filter Media, 10-oz
SunGrow Activated Carbon Charcoal Pellets Aquarium Filtration, Cat Litter Box & Water Fountain Deodorizer Filter Media, 10-oz
SunGrow Activated Carbon Charcoal Pellets Aquarium Filtration, Cat Litter Box & Water Fountain Deodorizer Filter Media, 10-oz
SunGrow Activated Carbon Charcoal Pellets Aquarium Filtration, Cat Litter Box & Water Fountain Deodorizer Filter Media, 10-oz
SunGrow Activated Carbon Charcoal Pellets Aquarium Filtration, Cat Litter Box & Water Fountain Deodorizer Filter Media, 10-oz
SunGrow Activated Carbon Charcoal Pellets Aquarium Filtration, Cat Litter Box & Water Fountain Deodorizer Filter Media, 10-oz

SunGrow Activated Carbon Charcoal Pellets Aquarium Filtration, Cat Litter Box & Water Fountain Deodorizer Filter Media, 10-oz

Rated 4.2 out of 5 stars
44
$11.95 Chewy Price
($1.20/oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.5/5
Great

Durability

4.5/5
Great

Ease of Use

4.7/5
Excellent

Filtration Efficiency

4.6/5
Excellent

Is this filter medium right for my pet?

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Betta, Cichlid, Marine Invertebrate...
8
AquaClear Activated Carbon Filter Insert, Size 30
AquaClear Activated Carbon Filter Insert, Size 30

AquaClear Activated Carbon Filter Insert, Size 30

Rated 4.8 out of 5 stars
124
$4.99 Chewy Price
($4.99/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.5/5
Great

Durability

4.7/5
Excellent

Ease of Use

4.7/5
Excellent

Filtration Efficiency

4.7/5
Excellent

Is this filter medium right for my pet?

Material

Mesh, Synthetic Fabric

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Betta, Cichlid, Goldfish...
9
Fluval Spec Biomax Filter Media
Fluval Spec Biomax Filter Media

Fluval Spec Biomax Filter Media

Rated 4.7 out of 5 stars
79
$5.99 Chewy Price
($5.99/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.7/5
Excellent

Durability

4.6/5
Excellent

Ease of Use

4.6/5
Excellent

Filtration Efficiency

4.6/5
Excellent

Is this filter medium right for my pet?

Material

Mesh, Synthetic Fabric

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater
10
Underwater Treasures Seapora Nitrate + Nitrite Pad

Underwater Treasures Seapora Nitrate + Nitrite Pad

Rated 4.8 out of 5 stars
33
$5.49 Chewy Price
($5.49/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Compatibility

4.6/5
Excellent

Durability

4.7/5
Excellent

Ease of Use

4.6/5
Excellent

Filtration Efficiency

4.6/5
Excellent

Is this filter medium right for my pet?

Aquarium Type

Freshwater

Fish Type

Tropical Freshwater, Marine Fish