Home / Forums / Melodica construction, repair and maintenance / Suzuki B24 Bass Melodion – Gapping / Reply To: Suzuki B24 Bass Melodion – Gapping Reply To: Suzuki B24 Bass Melodion – Gapping August 7, 2018 at 6:45 am #10151 Melodica-MeParticipant The bladder is absolutely necessary. The reason I replaced the bladder on the Hohner Basso was that it had a small tear that let all the air pressure escape and there was not enough pressure to sound a note once the tear got a little too big.