Berlin Turbo setup

[Cazoom]

did you get new/used... have you cleaned /dissassembled it?
really the only adjustment is water level which should be 1/2 way up the neck under the collection cup...
as well the airline should be secured but not pinched solid or no air can flow ... do you have lots of air mixing going on in chamber...
if you are filling a 2 l bottle in hours you prob just have level too high...
on my 90 gallon with 9 fish no corals i get a cup every other day...
on my 70 with an eel and 5 fish i get a cup a week...
let me know i have a few here... been patching a few together for a year so i'm learning them quite well...