Originally Posted by Perseusmom
Good question AyalaCookiejar and glad you bought it up because a few days ago I got one of the glow in the dark rocks, its white with blue kinda swirled around it. I am planning on changing out a couple of my decorations and going with a blue theme for Perseus`s tank home and I really love this rock cause it has holes in it he can swim though and he loves to swim though things. But I never stopped to think about what chemicals could be on it to make it glow, I was not going after the glow part really I just really loved this rock and knew Perseus would enjoy it because of the holes, I got it at Walmart of course...lol
I am going to search on goggle and see if I can find out for sure if they are safe or not because I am the world`s worst worrier when it comes to my fish...lol I have not put it in the tank yet by the way. Surely they would not sell anything that could be harmful to fish but you never know it always pays to find out for sure !
What causes things to glow in the dark are phosphors; Zinc Sulfide and Strontium Aluminate. It's either of those two that make things glow. Strontium Aluminate is the newer phosphor. All a phosphor does is radiate visible light after having been "charged" under a light. In essence, it absorbs light for a limited amount of time, which is why the glow of the item fades after a while. The phosphors are perfectly safe for aquariums when in a solid form (Like the moon cave and in plastic beads or pebbles). Obviously, liquid form is deadly, even dangerous for us humans. So don't go dropping glow sticks in your aquarium. Those plastic chambers end up leaking after a while.
However, moon cave, glow in the dark beads and pebbles, even those glow in the dark stars and the like, are all aquarium safe. Just make sure the stars don't have any glue-type residue on them. best bet is to buy new ones that come without a sticky side, or the ones that come with a paste you have to personally apply to the stars. Just dump the paste and rinse the stars, pebbles, whatever and put them in. They look nice at night or if you have a black light.
I have a black light in my room, and the light illuminates the tanks and makes everything glow that is meant to or is the right white or neon shade. if you manage to get that right white shade in a betta, it's AMAZING.