Email Sign-Up Go to Shopping Cart (0)
Most Trusted Everyday Low Prices Pet Pharmacy Satisfaction Guarantee Free Shipping Drs. Foster and Smith Pet Supplies
Frozen Food Shipping

Customer Service

Saltwater Mixing Containers, How to Create

Drs. Foster & Smith Educational Staff
Freshwater Aquariums: How to set up 
New to the Aquarium Hobby? 12 Considerations 
Popular Freshwater Fish for Beginners 
New Aquarium Set-up
Drs. Foster and Smith Live Nitrifying Bacteria
Drs. Foster and Smith Live Nitrifying Bacteria
As low as $5.59
Drs. Foster and Smith Instant Ammonia Remover
Drs. Foster and Smith Instant Ammonia Remover
As low as $4.19
CaribSea Instant Aquarium Freshwater Substrates
CaribSea Instant Aquarium Freshwater Substrates
As low as $22.65
How to create a saltwater mixing container How to create a saltwater mixing container
For about $65, you can create the perfect saltwater mixing container to have available for emergency water replacements, as well as your regular water changes. Always use purified water when mixing saltwater, either by purchasing distilled water or by producing it with an RO/DI filter.

What you need: Components for a saltwater mixing container.

What you do
Rinse your plastic trash container with tap water, no detergents, and place it next to the aquarium. Fill it with the amount of purified water you will need.

Measure and record the water temperature and specific gravity in the main aquarium.

Place the thermometer in the mixing container. Position the powerhead and the heater near the bottom of the mixing container to enable the salt to dissolve quicker.

Divide the total amount of salt required into three equal parts. Slowly add a third at a time to the mixing container, allowing it to dissolve completely before adding more. Check the water temperature as you go. When all the salt is completely dissolved, it's time to test specific gravity.

Target Specific Gravity Ranges:
1.020 to 1.024 for fish only systems;
1.023 to 1.025 for reef systems.
Target Temperature Ranges:
72-80°F for fish only; 75-78°F for reefs.

Crucial Testing
Refractometers measure salt levels in water very accurately even in low salt situations and compensate for temperature. Simply lift the plastic lid from the angular end, place a drop of water on the surface, and close the lid. Look through the viewing lens (round end) as if you're looking through a telescope. The line where the blue and white areas meet is your salinity or specific gravity, depending on which scale you use. Add salt if too low, water if too high.

Continue running the powerhead for several hours to thoroughly aerate the newly prepared saltwater. Ideally, the salt mix should be prepared at least 24 hours in advance, but airstones attached to an air pump can be used to achieve proper oxygen/carbon dioxide equilibrium. Once properly mixed, tested and oxygenated, the saltwater is ready to use. Be sure to use a lid when storing surplus saltwater to prevent contamination or evaporation.

We Recommend

High Precision Hydrometer
Instant Ocean
Vital Sine Refractometer
Vital Sine
Hagen AquaClear Powerheads
Hagen Aqua
Clear Powerheads
Marineland Visi-Therm Heaters
Visi-Therm Heaters


Click here for a more printer-friendly version of this article.  
Click here for a pdf version of this article.  



Contact us
8 am - 8 pm CST
7 days a week

7 am-10 pm, CST
7 days a week