What is the weight of a gallon of saltwater?

Saltwater weighs around 8.5 pounds per gallon. When determining the weight of a saltwater fish tank, people should use an average of 10 pounds per gallon.

When calculating the weight of a saltwater fish tank, add 1.5 pounds to account for the weight of the rock, tank, stand, and other accessories. It’s crucial to check whether the floor where the fish tank will be put can support the complete weight of the fish tank after it’s full of salt water and properly decorated, especially for larger fish tanks.

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Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.


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