Lee's Coarse Bubble Discard-a-stone

Plastic air diffusers for creating a world of bubbles in your aquarium. Include adapters for attaching to airline. Important Insert the adapter into the Coarse Bubble Discard-A-Stone. Replace the diffuser when bubbles start to decrease. To get small bubbles and better diffuser action, follow these steps when installing a new air diffuser: Disconnect air feed line from pump. Put a new diffuser on the airline nipple. Drop the diffuser into a glass of fresh water. Suck about ten inches of water from the glass into the airline slowly and then expel it by blowing air into the line. Repeat this operation five times. The air diffuser is now ready to use. Reconnect the airline to the pump and place the diffuser to your aquarium.