Manure tankers Marxen ST ST 3.25. Tankers-pumps Marxen — the right solution for professional use. Numerous contractors, large companies, operators of biogas plants and pig farms have been taking advantage of this sophisticated technology for many years. Marxen slurry tanks meet high performance and safety requirements with low operating and maintenance costs. Required power: 250 hp Cost: 142000 cu. Changed in 1.0.1: The file was overzipped.