Product name： ISTA Vertical 3 in 1 CO2 Diffuser #I-548
CO2 bubble counter, check valve and diffuser
These are the most practical diffusers available. Into a single piece, you have a check valve, a bubble counter and the diffuser. Also very important is that the ceramic plate can be replaced.
•3 functions in one unit: CO2 bubble counter, check valve and diffuser.
•Produces bubbles as small as a mist of CO2, generating maximum possible diffusion on CO2 in the aquarium.
•Undisputable quality and reliability.
•Easy to install.
For 4/6mm co2 tube (Does not contain)