Reef Salt Mix Calculator

Calculate exact salt amounts for perfect reef aquarium water changes

Our professional salt mix calculator determines the precise amount of reef salt needed for water changes in your marine aquarium. Maintaining proper salinity is crucial for coral health, fish wellness, and overall reef tank stability. Calculate exact salt requirements for any water change volume, with support for popular reef salt brands and temperature compensation for accurate mixing ratios.

Measurement Units
Salt Mix Product

Select the salt mix product you are using for water changes.

Water Volume

Enter the volume of water you are changing in your aquarium.

Water Temperature

Enter the temperature of the water you are mixing

Target Salinity

Use the slider to set the target salinity for your aquarium.

35.0
Salinity
PPT/PSU
1.0264
Specific Gravity
S.G.
30 PPT35 PPT (Ideal)40 PPT
Required Adjustment

This is the adjustment needed for your water.

Select salt product and enter water volume
Choose a salt mix and specify the volume to start calculation
Tip: Always mix salt in RO/DI water and allow to circulate for 24 hours before use. Test salinity after mixing is complete.

Ensure perfect salinity levels with precise salt calculations that eliminate guesswork and prevent salinity fluctuations harmful to reef organisms.

Select your preferred salt brand, enter water change volume and target salinity. Our calculator provides exact measurements for consistent, professional-quality artificial seawater.

Brand-Specific Formulas

Optimized calculations for Red Sea, Instant Ocean, Tropic Marin, and other popular reef salt brands.

Perfect Water Changes

Calculate exact salt amounts for consistent salinity levels and stress-free water changes.

Temperature Aware

Temperature compensation ensures accurate mixing ratios for optimal artificial seawater quality.