I have an old class CO2 diffuser that recently has desided to only bubble on one side of the cup (perimeter of withe disk). Even after cleaning it in a mild bleach solution it still does this. So I figured that it has finally weakened in this area and it is time to get a new diffuser.
My question is, in shoping for a new diffusser I have come across these diffusers that have a coil on the inside. example http://www.aquabuys.com/miva/merchan...j_co2_diffuser
Does the coil improve CO2 tansfer or is this just cool looking?