Add a fun and mysterious vibe to your aquarium with these glow-in-the-dark radioactive barrels decorated with colorful octopuses! These barrels light up in the dark, creating a magical effect in your tank. Some barrels are open, giving your fish a special hiding spot. These detailed, poison-free decorations are safe for both fresh and saltwater aquariums, and they won’t affect the biological balance of your water. Simply rinse with lukewarm water before placing them in your tank.