★ 5.0 (1)JBL ProFlora CO2 Refill Bio are the refill components for the JBL Bio-CO2-systems, consists of the bio components (A and B). JBL ProFlora CO2 Refill Bio: + bio-components (A and B) for bio-CO2 systems + easy to use: simply add complete refill to the diffusor container and fill with water + provides aquariums of 30 - 80 l with the basic plant nutrient, carbon dioxide (CO2) for 40 days + natural, biological process: CO2 extraction through fermentation process + including stabiliser for constant CO2 production + consists of the two components A and B.