OSOPOLA 350 PCS Luminous Stones - Blue Glow Rocks Decorations DIY Decorative Pebbles for Aquarium Fish Tank Sidewalk Garden Path Patio Terrace Lawn Yard Ornaments Blueness Cobbles Decor FD05BL350

I was under the impression these stones would glow in the dark after soaking up sun.. well they don't I've had them in place outdoors in the sun (for hours and hours) and yet when the evening/night came they were just green stones, not even obvious that they were there.. but during the day they are a pretty green color. Maybe I was expecting them to be like the solar lights and sort of glow in the dark.. ???

These are OK for the price that I paid. Be aware that they do tend to float when you add water to the tank so they move around. Also, they don’t go low in the dark as much they might do differently under UV or black light, but I don’t have that in my fish tank.

It is a plastic not stone.