New Delhi, Dec. 17 -- Decorating a home aquarium is often an exciting process. From rinsing the gravel and placing new filters, attention then turns to the finishing touches - caves, ornaments, and other decorations that turn a glass box into an underwater scene.

But appearances can be misleading. Some decorations that look harmless can quietly damage water quality, injure fish, or introduce toxins over time. By the time symptoms are visible, the source is often overlooked. Below are seven decorations you should avoid keeping in your fish tanks, as per Bunko Pet, along with the reasons they pose risks.

Painted figures not designed for aquarium use can shed pigment once submerged. As paint wears away, flakes may enter filters, or fish mi...