How much salt do I need to make a 10 gallon tank salinity 5%o?

Question

How much salt do I need to make a 10 gallon tank salinity 5%o?

Answer 1

One gallon weighs 8.34 pounds.  10 gal. = 83.40 lbs.

83.40 X 0.05 = 4.17 lbs.

Add 4.17 pounds of salt to a final volume of 10 gallons to make a 5% w:v solution.

Hope this helps.