ISTA Compact V 3 in 1 Co2 Diffuser Bubble Counter Check Valve Aquarium (L) Plant

hese 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. CHARACTERISTICS: ?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. ?Compact size. ?Easy to install.For 4/6mm co2 tube (Does not contain)CO2 bubble counter, check valve and diffuse