Feng shui of raising eight red fish and one black fish

Maybe it's gossip from Jiugong. Basically, no one will keep 9, but generally they only keep the number 167. The hexagram belongs to water, one or six, and the congenital hexagram is seven. The 1689 of the nine planets is a lucky number. Black belongs to water, and feng shui fish flourish. Fish tanks should be placed in the northeast or southeast direction, or in an inclined position. Feng shui fish have black, which is the practice of gathering money and keeping it.