50PCS Glow In The Dark Pebbles Luminous Stones Garden Walkaway Aquarium Fish Tank

- 50PCS Man-made Pebbles   Notes :    - Please absorb the visible light for 15-30 minutes before first-time use of this product (Please don’t absorb the visible light more than 30 minutes), then stones can glow in completely dark place for more than 10 hours.    - Please note that if stones absorb the visible light more than 10 hours (will be bright in the first 5mins, and will still emit light but dim out for the remaining time), they will only glow 5-6 mintues in the dark place.    - After the first-time use, the stones will absorb the visible light everyday in the daytime and glow in completely dark place.