The Lake Nyos degassing column, activated in April 2001, had several problems during its first two years in action. An extremely aggressive corrosion put all of the metal parts of the column (bolting, dolly axles, etc.) out of action. In July 2003 all these metallic components were replaced by stainless steel parts.
Since then the column has functioned perfectly (cf. images of the 50 m high jet, transmitted twice daily by satellite) and has brought the process of enrichment of the deep layers of the lake in dissolved gas to a halt.