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Alan Stone Glow in The Dark Home and Garden Fish Tank Aquarium Decorative Sand Gravel Rock (3-5mm, Aqua)

$16.99
Make sure this fitsby entering your model number. When you receive the parcel please kindly put all the gravels in the sun for about half an hour to make them charge fully for the first time use, then you can watch in the dark, they will glow brightly. They will last the glowing for about 2 -3 hours in the fully dark space. They can charge and glow repeatedly. If you want it to glow all the time in the dark indoor or outdoor please install a LED UV black light above them.