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|Type||limited liability company/family owned|
|Josef Ravnak, General manager, Anny Ravnak, Commercial management|
Sera is a company that produces and sells home aquaculture and aquarium products and food for pet fish. The company is based in Heinsberg (North Rhine-Westphalia), Germany. It was founded in 1970 by Josef Ravnak. The name “sera” is a combination of Ravnak's first name, Sepp (nickname of Josef), and his family name, Ravnak.
sera vipan flakes, the company's flagship food, was introduced in 1972. The company focus broadened to include the aquarium hobby as a whole and throughout the decade they developed water conditioners, such as sera aqutan and sera morena; aquatic plant fertilizers, such as sera florena; and aquarium fish medications, such as sera costapur and sera baktopur. A series of water testing kits was also developed.
Throughout the 1980s, sera increased its product lines with foods, vitamins, and technological products. During these years the acclaimed sera Bio-Denitrator was launched, which was the first mechanism to target the biological breakdown of nitrate in an aquarium.