What water treatment do I need for a saltwater aquarium?

Saltwater aquariums typically require a high-quality marine salt mix, dechlorinator, pH stabilizer, and supplements like calcium and alkalinity buffers. These treatments work together to mimic natural ocean conditions and maintain water quality.

What is the best salt mix for a saltwater aquarium?

The best salt mix depends on your tank setup. Reef tanks often benefit from reef-specific mixes rich in calcium, magnesium, and trace elements, while fish-only systems may require a standard marine salt blend.

Do I need a special water conditioner for saltwater tanks?

Yes. Use a water conditioner made for saltwater or reef tanks to remove chlorine, chloramine, and heavy metals without harming corals or invertebrates. Some conditioners also support slime coat protection for fish.

Do saltwater fish tanks require a special pH level?

Saltwater tanks should maintain a pH between 8.0 and 8.4. Using a buffer or stabilizer helps keep pH within this ideal range and prevents fluctuations that can stress marine life.

Saltwater Aquarium Water Treatment - Page 5 (Free Shipping)

Slide 1 of 4

Hydrospace PNS ProBio Fish Aquarium Additive, Maroon, 16-fl oz slide 2 of 4

Hydrospace PNS ProBio Fish Aquarium Additive, Maroon, 16-fl oz slide 3 of 4

Hydrospace PNS ProBio Fish Aquarium Additive, Maroon, 16-fl oz slide 4 of 4

Slide 1 of 4

New

Hydrospace PNS ProBio Fish Aquarium Additive, Maroon, 16-fl oz

$30.99 Chewy Price

($1.94/oz) Price per Unit

Autoship Price

Contains Live Feed

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Slide 1 of 3

Pure Water Pebbles Bio-Activ Live African Cichlid Aquarium Substrate, Rift Lake, 20-lb bag slide 2 of 3

Pure Water Pebbles Bio-Activ Live African Cichlid Aquarium Substrate, Rift Lake, 20-lb bag slide 3 of 3

Slide 1 of 3

Pure Water Pebbles Bio-Activ Live African Cichlid Aquarium Substrate, Rift Lake, 20-lb bag

Rated 4.7 out of 5 stars

49

$26.25 Chewy Price

($1.32/lb) Price per Unit

$27.02 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Slide 1 of 3

ASF SeaTest Ca2+ Calcium Fish Aquarium Water Test Kit, 40 count slide 2 of 3

ASF SeaTest Ca2+ Calcium Fish Aquarium Water Test Kit, 40 count slide 3 of 3

ASF SeaTest Ca2+ Calcium Fish Aquarium Water Test Kit, 40 count

Rated 3 out of 5 stars

1

$21.69 Chewy Price

($0.55/ea) Price per Unit

$27.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Fluval Sea Calcium Aquarium Water Conditioner, 8-oz bottle

Rated 4.8 out of 5 stars

4

$8.50 Chewy Price

($1.07/oz) Price per Unit

$9.87 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Ammonia NH3/NH4 Freshwater & Saltwater Aquarium Test Strips, 25 count

Rated 4.3 out of 5 stars

13

$16.98 Chewy Price

($0.68/ea) Price per Unit

$23.98 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API Reef Magnesium Marine Aquarium Solution, 16-oz bottle

$12.98 Chewy Price

($0.82/oz) Price per Unit

$18.28 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics AquaCleanse Saltwater Aquarium Cleaner, 8-fl oz bottle

$13.89 Chewy Price

($1.74/oz) Price per Unit

$16.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics Reef One & Only Marine Aquarium Cleaner, 32-fl oz bottle

$178.39 Chewy Price

($5.58/fl oz) Price per Unit

Autoship Price

Free delivery on first-time orders
Free 365-day returns
Arrives between Apr 13 and Apr 16

Kordon Fish Protector Aquarium Water Conditioner, 16-fl oz bottle

Rated 4.6 out of 5 stars

7

$10.99 Chewy Price

($0.69/fl oz) Price per Unit

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Microbe-Lift Aquatic Stress Relief Aquarium Treatment, 16-oz bottle

Rated 4.5 out of 5 stars

2

$10.36 Chewy Price

($0.65/oz) Price per Unit

$17.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Hydrospace PNS HomeGro Fish Aquarium Bacteria, Blue, 2.5-gal

$145.99 Chewy Price

($58.40/gl) Price per Unit

$150.99 List Price

Autoship Price

Contains Live Feed

Free 1-3 day delivery on first-time orders
Free 365-day returns

Dr. Tim's Aquatics One & Only Saltwater Aquarium Cleaner, 16-fl oz bottle

$122.59 Chewy Price

($7.67/oz) Price per Unit

$149.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Fritz Aquarium Water Nitrite Test Kit

Rated 3 out of 5 stars

1

$11.99 Chewy Price

$15.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

ASF SEATEST GH Total Hardness Fish Aquarium Water Test Kit, 40 count

$18.99 Chewy Price

($0.48/ea) Price per Unit

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

ASF Reef Shots Magnesium Aquarium Treatment, 16-oz bag

$23.50 Chewy Price

($1.47/oz) Price per Unit

$23.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Nature's Ocean Bio-Activ Live Aragonite Saltwater Aquarium Sand, Reef Substrate, 8-lb bag

Rated 4.3 out of 5 stars

22

$16.64 Chewy Price

($2.08/lb) Price per Unit

$17.36 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics Clear-Up Saltwater Aquarium Cleaner, 8-fl oz bottle

$25.09 Chewy Price

($3.14/oz) Price per Unit

$30.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics Shrimp First Defense Water Conditioner, 4-fl oz bottle

$11.29 Chewy Price

($2.83/fl oz) Price per Unit

$13.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics Re-Fresh Reef Tank Revitalizer, 8-fl oz bottle

Rated 2.7 out of 5 stars

3

$26.99 Chewy Price

($3.38/fl oz) Price per Unit

$44.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Hydrospace PNS ProBio Fish Aquarium Additive, Maroon, 1-gal

$185.99 Chewy Price

($185.99/gl) Price per Unit

Autoship Price

Contains Live Feed

Free 1-3 day delivery on first-time orders
Free 365-day returns

Fritz RPM Elements Alkalinity Aquarium Water Treatment, 1-gal bottle

Rated 4.5 out of 5 stars

4

$28.99 Chewy Price

($28.99/gl) Price per Unit

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aqueon AquaPacs Aquarium Water Conditioner, 12 pack, 10-gal

Rated 4.5 out of 5 stars

12

$13.47 Chewy Price

($0.12/gl) Price per Unit

$16.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics First Defense Saltwater Aquarium Cleaner, 4-fl oz bottle

$12.79 Chewy Price

($3.20/oz) Price per Unit

$15.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Salifert Aquarium Potassium Test Kit

Rated 3.3 out of 5 stars

3

$17.84 Chewy Price

$18.81 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

ASF SeaTest NO3- Nitrate Fish Aquarium Water Test Kit, 40 count

$20.29 Chewy Price

($0.51/ea) Price per Unit

$23.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Coralife Filter Bio Balls Fish Salt Minerals, 5 gallons

$79.99 Chewy Price

($16.00/gl) Price per Unit

$119.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

API Pond 5-IN-1 Test Strips, 25 count

Rated 4.6 out of 5 stars

24

$14.98 Chewy Price

($0.60/ea) Price per Unit

$20.98 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics Reef Clear-Up Marine Aquarium Cleaner, 8-fl oz bottle

Rated 1 out of 5 stars

1

$25.09 Chewy Price

($3.14/oz) Price per Unit

$30.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics Reef One & Only Marine Aquarium Cleaner, 16-fl oz bottle

$122.59 Chewy Price

($7.67/oz) Price per Unit

$149.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

ASF Reef Shots Calcium Aquarium Treatment, 16-oz bag

$20.16 Chewy Price

($1.26/oz) Price per Unit

$23.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics Reef Re-Fresh Marine Aquarium Cleaner, 16-fl oz bottle

Rated 3 out of 5 stars

1

$60.69 Chewy Price

($3.80/fl oz) Price per Unit

Autoship Price

Free delivery on first-time orders
Free 365-day returns
Arrives between Apr 13 and Apr 16

ASF Reef Shots Vitamins Aquarium Treatment, 16-oz bag

$19.99 Chewy Price

($1.25/oz) Price per Unit

$23.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

ASF SeaTest pH Fish Aquarium Water Test Kit, 100 count

Rated 5 out of 5 stars

1

$12.39 Chewy Price

($0.13/ea) Price per Unit

$20.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dennerle Scraper's Soil Active Aquarium Substrate, 4-L bag

Rated 5 out of 5 stars

2

$35.00 Chewy Price

($8.75/l) Price per Unit

Autoship Price

Free delivery on first-time orders
Free 365-day returns
Arrives between Apr 12 and Apr 16

Dr. Tim's Aquatics AquaCleanse Saltwater Aquarium Cleaner, 128-fl oz bottle

$57.89 Chewy Price

($0.46/fl oz) Price per Unit

Autoship Price

Free delivery on first-time orders
Free 365-day returns
Arrives between Apr 13 and Apr 16

Ruby Reef Kick-Ich NANO Formula Aquarium Water Treatment, 8-fl oz bottle

Rated 4.2 out of 5 stars

5

$8.99 Chewy Price

($1.13/fl oz) Price per Unit

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Saltwater Aquarium Water Treatment

Hydrospace PNS ProBio Fish Aquarium Additive, Maroon, 16-fl oz

Pure Water Pebbles Bio-Activ Live African Cichlid Aquarium Substrate, Rift Lake, 20-lb bag

ASF SeaTest Ca2+ Calcium Fish Aquarium Water Test Kit, 40 count

Fluval Sea Calcium Aquarium Water Conditioner, 8-oz bottle

API Ammonia NH3/NH4 Freshwater & Saltwater Aquarium Test Strips, 25 count

API Reef Magnesium Marine Aquarium Solution, 16-oz bottle

Dr. Tim's Aquatics AquaCleanse Saltwater Aquarium Cleaner, 8-fl oz bottle

Dr. Tim's Aquatics Reef One & Only Marine Aquarium Cleaner, 32-fl oz bottle

Kordon Fish Protector Aquarium Water Conditioner, 16-fl oz bottle

Microbe-Lift Aquatic Stress Relief Aquarium Treatment, 16-oz bottle

Hydrospace PNS HomeGro Fish Aquarium Bacteria, Blue, 2.5-gal

Dr. Tim's Aquatics One & Only Saltwater Aquarium Cleaner, 16-fl oz bottle

Fritz Aquarium Water Nitrite Test Kit

ASF SEATEST GH Total Hardness Fish Aquarium Water Test Kit, 40 count

ASF Reef Shots Magnesium Aquarium Treatment, 16-oz bag

Nature's Ocean Bio-Activ Live Aragonite Saltwater Aquarium Sand, Reef Substrate, 8-lb bag

Dr. Tim's Aquatics Clear-Up Saltwater Aquarium Cleaner, 8-fl oz bottle

Dr. Tim's Aquatics Shrimp First Defense Water Conditioner, 4-fl oz bottle

Dr. Tim's Aquatics Re-Fresh Reef Tank Revitalizer, 8-fl oz bottle

Hydrospace PNS ProBio Fish Aquarium Additive, Maroon, 1-gal

Fritz RPM Elements Alkalinity Aquarium Water Treatment, 1-gal bottle

Aqueon AquaPacs Aquarium Water Conditioner, 12 pack, 10-gal

Dr. Tim's Aquatics First Defense Saltwater Aquarium Cleaner, 4-fl oz bottle

Salifert Aquarium Potassium Test Kit

ASF SeaTest NO3- Nitrate Fish Aquarium Water Test Kit, 40 count

Coralife Filter Bio Balls Fish Salt Minerals, 5 gallons

API Pond 5-IN-1 Test Strips, 25 count

Dr. Tim's Aquatics Reef Clear-Up Marine Aquarium Cleaner, 8-fl oz bottle

Dr. Tim's Aquatics Reef One & Only Marine Aquarium Cleaner, 16-fl oz bottle

ASF Reef Shots Calcium Aquarium Treatment, 16-oz bag

Dr. Tim's Aquatics Reef Re-Fresh Marine Aquarium Cleaner, 16-fl oz bottle

ASF Reef Shots Vitamins Aquarium Treatment, 16-oz bag

ASF SeaTest pH Fish Aquarium Water Test Kit, 100 count

Dennerle Scraper's Soil Active Aquarium Substrate, 4-L bag

Dr. Tim's Aquatics AquaCleanse Saltwater Aquarium Cleaner, 128-fl oz bottle

Ruby Reef Kick-Ich NANO Formula Aquarium Water Treatment, 8-fl oz bottle

Product Type

Fish Type

Health Feature

Brand

Price

Customer Rating