1.MOVING WITH WATER FLOWS JUST LIKE REAL : These soft silicone artificial glow in the dark fish tank decorations can sway and move gently with the water flows, just like real fish tank plants moving in the tank turns your tedious fish tank into a lifelike ocean landscape. 2.SAFE TO FISH : Our glowing fish tank decorations plants are made of silicone, and non-toxic to fish, plant, water and lively creature.The materials we used hold the authoritative SGS certification certificate. Our betta fish tank decor are durable for long time using, soft material won't scratch fishes 3.EASY TO INSTALL AND REMOVE : The glow aquarium decorations have strong Resin base and sucker, can be fixed on the bottom of the fish tank without floating out of the water. 4.GLOW UNDER EXTRA LIGHTS: These Charming Aquarium Décor ornaments don't glow automatically in the dark,The Glowing Effect will only happen under actinic lighting.We recommend blue & white light, blue light or purple light to get better effect.Not "Glow In the Dark"!