Basic Calculation Guides How to figure out how many fish your tank can hold (Round Down):
Aquarium Volume (Gallons) / Adult length of fish = Total amount of that fish type your tank can hold
If your tank already has fish (Round Down):
Aquarium Volume (Gallons) - Current total Length of fish in tank / New Fish length = Amount of new fish
How much gravel do I need?
Aquarium Volume (Gallons) / 0.5 = Amount of gravel needed (lbs)
How much water do I need to replace every week?
Aquarium Volume (Gallons) * 0.15 = Amount of water that needs to be replaced every week. Conversion Calculations How to convert imperial gallons to litres (Divide litres by 4.55 to find litres to gallons):
Number of gallons * 4.55 = Number of litres (that is the same volume as imputed number of gallons). Adding Taxes To add tax to your total simply plug your local taxation rate into the "XX" is the equation:
Total * 1.XX = Total With Tax