10 Best Saltwater Aquarium Supplies 2025: According to Reviews | Chewy

The 10 Best Saltwater Aquarium Supplies

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How we created this saltwater aquarium supply list

We leveraged input from our veterinarians and artificial intelligence to identify key considerations to help you find the best saltwater aquarium supply.
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 saltwater aquarium supplies.

Key saltwater aquarium supply considerations

Compatibility

Durability

Effectiveness

User-Friendliness

1
Tetra Bio-Bag Large Disposable Filter Cartridges, 12 count
Tetra Bio-Bag Large Disposable Filter Cartridges, 12 count
Tetra Bio-Bag Large Disposable Filter Cartridges, 12 count
Tetra Bio-Bag Large Disposable Filter Cartridges, 12 count
Tetra Bio-Bag Large Disposable Filter Cartridges, 12 count
Tetra Bio-Bag Large Disposable Filter Cartridges, 12 count
Tetra Bio-Bag Large Disposable Filter Cartridges, 12 count

Tetra Bio-Bag Large Disposable Filter Cartridges, 12 count

Rated 4.7 out of 5 stars
756
$14.55Chewy Price
($1.22/ea)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.6/5
Excellent

Durability

4.5/5
Great

Effectiveness

4.6/5
Excellent

User-Friendliness

4.5/5
Great

Is this saltwater aquarium supply right for my pet?

Material

Mesh, Synthetic Fabric

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Marine Fish
2
API Tap Water Conditioner, 16-fl oz bottle
API Tap Water Conditioner, 16-fl oz bottle
API Tap Water Conditioner, 16-fl oz bottle
API Tap Water Conditioner, 16-fl oz bottle
API Tap Water Conditioner, 16-fl oz bottle
API Tap Water Conditioner, 16-fl oz bottle

API Tap Water Conditioner, 16-fl oz bottle

Rated 4.8 out of 5 stars
367
$8.49Chewy Price
($0.54/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.6/5
Excellent

Durability

4.6/5
Excellent

Effectiveness

4.8/5
Excellent

User-Friendliness

4.7/5
Excellent

Is this saltwater aquarium supply right for my pet?

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Cichlid, Betta, Goldfish...
3
Marineland Bio-Wheel Penguin Rite-Size C Filter Cartridge, 6 count
Marineland Bio-Wheel Penguin Rite-Size C Filter Cartridge, 6 count
Marineland Bio-Wheel Penguin Rite-Size C Filter Cartridge, 6 count
Marineland Bio-Wheel Penguin Rite-Size C Filter Cartridge, 6 count
Marineland Bio-Wheel Penguin Rite-Size C Filter Cartridge, 6 count

Marineland Bio-Wheel Penguin Rite-Size C Filter Cartridge, 6 count

Rated 4.7 out of 5 stars
651
$19.99Chewy Price
($3.34/ea)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.3/5
Great

Durability

4.4/5
Great

Effectiveness

4.5/5
Great

User-Friendliness

4.4/5
Great

Is this saltwater aquarium supply right for my pet?

Material

Foam

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Marine Fish
4
Instant Ocean Sea Salt for Aquariums, 200-gal
Instant Ocean Sea Salt for Aquariums, 200-gal
Instant Ocean Sea Salt for Aquariums, 200-gal
Instant Ocean Sea Salt for Aquariums, 200-gal
Instant Ocean Sea Salt for Aquariums, 200-gal
Instant Ocean Sea Salt for Aquariums, 200-gal

Instant Ocean Sea Salt for Aquariums, 200-gal

Rated 4.7 out of 5 stars
293
$56.90Chewy Price
($0.29/gl)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.5/5
Great

Durability

4.5/5
Great

Effectiveness

4.5/5
Great

User-Friendliness

4.5/5
Great

Is this saltwater aquarium supply right for my pet?

Aquarium Type

Saltwater

Fish Type

Marine Fish, Marine Invertebrate
5
Zoo Med Floating Betta Log
Zoo Med Floating Betta Log
Zoo Med Floating Betta Log
Zoo Med Floating Betta Log
Zoo Med Floating Betta Log
Zoo Med Floating Betta Log

Zoo Med Floating Betta Log

Rated 4.4 out of 5 stars
303
$7.99Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.3/5
Great

Durability

4.5/5
Great

Effectiveness

4.4/5
Great

User-Friendliness

4.5/5
Great

Is this saltwater aquarium supply right for my pet?

Material

Wood

Aquarium Type

Freshwater, Saltwater

Fish Type

Betta
6
AquaClear Activated Carbon Filter Insert, Size 50, 3 count

AquaClear Activated Carbon Filter Insert, Size 50, 3 count

Rated 4.8 out of 5 stars
74
$9.99Chewy Price
($3.33/ea)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.4/5
Great

Durability

4.5/5
Great

Effectiveness

4.3/5
Great

User-Friendliness

4.5/5
Great

Is this saltwater aquarium supply right for my pet?

Material

Mesh, Synthetic Fabric

Aquarium Type

Saltwater, Freshwater

Fish Type

Tropical Freshwater, Marine Fish
7
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt

LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt

Rated 4.7 out of 5 stars
71
$23.99Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.6/5
Excellent

Durability

4.5/5
Great

Effectiveness

4.5/5
Great

User-Friendliness

4.7/5
Excellent

Is this saltwater aquarium supply right for my pet?

Material

Plastic

Aquarium Type

Saltwater

Capacity (Max)

≥120-250-L

Fish Type

Tropical Freshwater
8
Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count
Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count
Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count
Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count
Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count
Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count
Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count
Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count
Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count

Aqueon QuietFlow Large Replacement Filter Cartridges, 15 count

Rated 4.8 out of 5 stars
221
$42.95Chewy Price
($2.87/ea)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.6/5
Excellent

Durability

4.5/5
Great

Effectiveness

4.5/5
Great

User-Friendliness

4.4/5
Great

Is this saltwater aquarium supply right for my pet?

Material

Mesh, Synthetic Fabric

Aquarium Type

Freshwater, Saltwater

Fish Type

Marine Fish, Tropical Freshwater
9
AA Aquarium Green Killing Machine Internal UV System, 9-watt
AA Aquarium Green Killing Machine Internal UV System, 9-watt
AA Aquarium Green Killing Machine Internal UV System, 9-watt
AA Aquarium Green Killing Machine Internal UV System, 9-watt
AA Aquarium Green Killing Machine Internal UV System, 9-watt
AA Aquarium Green Killing Machine Internal UV System, 9-watt
AA Aquarium Green Killing Machine Internal UV System, 9-watt
AA Aquarium Green Killing Machine Internal UV System, 9-watt
AA Aquarium Green Killing Machine Internal UV System, 9-watt

AA Aquarium Green Killing Machine Internal UV System, 9-watt

Rated 4.3 out of 5 stars
385
$61.11Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.2/5
Great

Durability

4.3/5
Great

Effectiveness

4.4/5
Great

User-Friendliness

4.1/5
Great

Is this saltwater aquarium supply right for my pet?

Aquarium Type

Freshwater, Saltwater
10
API Stress Coat Aquarium Water Conditioner, 16-fl oz bottle
API Stress Coat Aquarium Water Conditioner, 16-fl oz bottle
API Stress Coat Aquarium Water Conditioner, 16-fl oz bottle
API Stress Coat Aquarium Water Conditioner, 16-fl oz bottle
API Stress Coat Aquarium Water Conditioner, 16-fl oz bottle
API Stress Coat Aquarium Water Conditioner, 16-fl oz bottle

API Stress Coat Aquarium Water Conditioner, 16-fl oz bottle

Rated 4.8 out of 5 stars
572
$10.99Chewy Price
($0.69/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Compatibility

4.6/5
Excellent

Durability

4.5/5
Great

Effectiveness

4.7/5
Excellent

User-Friendliness

4.5/5
Great

Is this saltwater aquarium supply right for my pet?

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Betta, Cichlid, Goldfish...

Health Feature

Anti-Fungal / Anti-Bacterial