What does it mean to have six black goldfish and one red goldfish in the small fish tank beside the bed?

Six black goldfish and one red goldfish play a role in preventing money. The color of fish is gold, which means that the five elements belong to gold, and gold can produce water, so the power of urging wealth is very strong. The color of fish is black, that is, the five elements belong to water, water can flourish, and the power to urge money is also very strong. But it's not clear why it's beside the bed. Generally speaking, it should be placed in the financial position, and it is best not to put it in the bedroom, especially the fish tank beside the bed.