Photoluminescent Tumbled Gravel FOR Tanks and Aquarium.

Realglow luminous plunge, luminous crushed stone gravel ASLO called Photoluminescent Tumbled Gravel. Take a few hours after the ball mill machine, the edge of the "to be round. They not only have normal glow in the dark stone best character, but also has its own character. They are more suitable for use of tanks and aquarium.