What is the feng shui of building fish ponds and fake stone mountains on the top floor of the house?

What is the geomantic omen of building a fish pond on the top floor of a house? The fish pond on the roof needs extremely high technical treatment experience, otherwise it will encounter certain troubles in the future, mainly because the anti-leakage technology needs special clearance. People who admire fake fish ponds on the floor generally consider the problem from the perspective of heat insulation and sun protection, and few people plan to make feng shui. Think from different angles with the method of Book of Changes: the rockery on the roof has the function of heatstroke prevention and heat insulation, but it will also increase the probability of moisture and leakage, improve the technical requirements of the overall structure of the house, and increase the construction cost and capital consumption.