1, round fish tank, the five elements belong to gold, which can produce flourishing water, so it is an auspicious symbol. From the perspective of geomantic omen, circular fish tanks are the most suitable in principle, but due to the influence of building structure and other factors, circular fish tanks are rare.
2, rectangular fish tank, five elements of wood, although the release of water vapor, but the two are related, can also be used. Put it aside.
3, square fish tank, the five elements belong to the soil, the soil can grams of water, there is restraint, so when choosing a fish tank, it is not appropriate to choose a square with five elements of soil.
4, hexagonal fish tank, with six as the water number, so the five elements belong to water and can be used. This shape is not suitable for placement because it has a strong sense of suffocation.
5, triangular or octagonal or even polygonal fish tanks, the five elements belong to fire, and the fire and water are complicated, which is not suitable for the layout of wealth. Put it in the corner.