To calculate the number of fish per gallon:
\[ FPG = \frac{TV}{\frac{FS}{12}} \]
Where:
Fish per gallon is a measure used by aquarium hobbyists to estimate the number of fish that can be safely kept in a specific volume of water. This measure helps to ensure that the biological load of the tank does not exceed the capacity of the filtration system and that the fish have enough space to thrive without stress. A common rule of thumb is one inch of fish per gallon of water.
Assume you have a tank volume of 50 gallons and the average fish size is 6 inches.
Using the formula:
\[ FPG = \frac{50}{\frac{6}{12}} = \frac{50}{0.5} = 100 \]
The number of fish per gallon is 100. This means you can have up to 100 fish in a 50-gallon tank if each fish is 6 inches long.
