nry
Member
I've found that unless I have my lily pipe outlet breaking the waterline significantly I still get a build up of surface scum (like that which hangs around lampposts at night but easier to get rid of) - moving it beneath the surface does give a vortex but this doesn't help much to clear the scum, barely touches it usually.
Is it usual to place the outlet above, beneath or on the waterline? Mine are the PM 12mm pipes for reference.
Is it usual to place the outlet above, beneath or on the waterline? Mine are the PM 12mm pipes for reference.