Gallons.
I am guessing you can use Gallons.
The volume of water in liters or gallons is the best measure to describe the amount of water in a home aquarium. This measurement helps determine correct dosages for treatments, stocking levels for fish, and equipment needs such as filters and heaters.
Litres or kilograms.Litres or kilograms.Litres or kilograms.Litres or kilograms.
If you are trying to measure concentration of salt in water you would be measuring molarity which is moles / liter. Moles are equal to grams of salt / the MW of salt (and if you mean NaCl then the MW is 58.44 g/mol). Density is a ratio of mass to volume (mass / volume or kg/m^3)
you dont count you measure it
the amount of water
Measure its dimensions in inches or centimeters, and its volume or capacity in gallons or litres.
In a rectangular aquarium, multiply the length, width, and height in inches and then divide the answer by 231 to get the amount of gallons the tank can hold.
They're measured in gallons in the US, and liters everywhere else. This holds true no matter how big the tank is--the New England Aquarium in Boston has a tank they describe as holding one million gallons of water.
gallons
Yes, the measure of the amount of matter in a substance is mass. It is typically measured in units such as grams or kilograms.
gallons