The phrase "gallon tank" refers to a container or storage unit that can hold a specific amount of liquid, usually measured in gallons. It is often used to describe the capacity or size of a fuel, water, or storage tank. Full definition
He also has a 10,000 gallon tank of water on his home's property that can serve as backup to the municipal water supply in emergencies. (inc.com)
The grain required to fill an SUV's 25 - gallon tank with ethanol just once will feed one person for a whole year. (treehugger.com)
A much better choice if you have the room and enough inventory is to use 10 - gallon tanks in which you can actually supply or create a habitat for the animals. (petbusiness.com)