The perfect product combination for splendid aquatic plants sera CO 2 -Start - ideal CO 2 fertilization for aquariums between 60 liters (15.9 US gal.) and 200 liters (53 US gal.) The kit consists of: sera CO 2 diffusion reactor sera CO 2 -Tabs plus (20 tablets) sera florena 100 ml (3.38 fl.oz.) - liquid plant fertilizer with iron, minerals and trace elements sera florenette 24 tablets - iron and mineral fertilizer tablets sera guide "Systemic plant care"