Bloontonium Storage Tank

"''These special tanks safely contain the dangerous substance known as Bloontonium. Each tank can only support a limited amount. so smart monkeys build several. Fill the tanks with Bloontonium Generators, or by popping Bloons sent by other Monkey v Monkey players." ''

~ Official description

The Bloontonium Storage Tank is a building in Bloons Monkey City. Each one costs $1000, occupies one square and stores 1000 Bloontonium for use in Monkey V Monkey battles. Unlike the Monkey Bank, they cannot be upgraded, so the only way to increase your Bloontonium capacity further is to build another one.