And, after an initial cost of 60 bucks to buy the bacteria, which you'll never have to pay again, one cubic meter of bacterial sand would be about 11 dollars.
E, depois de um custo inicial de 60 pratas para comprar a bactéria, que nunca terá de pagar novamente, um metro cúbico de areia com bactéria seria cerca de 11 dólares.