Can somone tell me where the air adjustment screw is on the berlin 25-250 gal skimmer? Is it the 2 small looking plastic screw things sticking straight into the air? Are both supposed to be adjusted?
Also, What is the hose barb for? I got a used one and it did not come with it.
Also, What is the hose barb for? I got a used one and it did not come with it.
