An aquarium is not only a decorative item. In Vastu, moving water is considered a symbol of f low, opportunity, and active energy. That is why many traditional Vastu practitioners recommend a clean aquarium in the North direction, especially in the living room, because North is linked with Kubera, prosperity, and financial movement. The common practice of keeping 9 fish, usually 8 gold and 1 black, is followed in many Vastu and Feng Shui traditions. The gold fish are seen as symbols of growth and brightness, while the black fish is traditionally believed to absorb negative vibrations. Whether one sees this spiritually or symbolically, the deeper message is simple: water must remain clean, alive, and continuously moving. However, an aquarium should never be neglected. Dirty water, sick fish, broken filters, or a dead aquarium can create the opposite feeling: heaviness, dullness, and emotional stagnation. Keep the tank clean, well-lit, and peaceful. This is general Vastu guidance. Exact placement depends on the full layout, entrance, directions, cuts, extensions, and energy balance of the home.