Question 1

How do I calculate aquarium volume?

Accepted Answer

Length × Width × Height in inches, then divide by 231 for gallons. For liters: L × W × H in cm, divide by 1000.

Question 2

How many gallons per fish in an aquarium?

Accepted Answer

General rule: 1 gallon per inch of fish. A 20-gallon tank could hold about 10 two-inch fish, but research specific species needs.

Question 3

Are US and UK gallons the same?

Accepted Answer

No! US gallon = 3.785 liters. UK (Imperial) gallon = 4.546 liters. UK gallon is about 20% larger. Same applies to pints and fluid ounces.

Question 4

What's the most accurate way to measure volume?

Accepted Answer

For precision: measure by weight and convert using density. For liquids at eye level: read at the bottom of the meniscus curve.

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