If within Great Britain, this product is not recommended due to the presence of polyhexamethylene biguanide (PHMB). Please instead order below GB version that is PHMB Free

G-8940006GB - Water Bath Protective Media Aqua Stabil PHMB Free 6 x 100ml Julabo 8940006GB
G-8940012GB - Water Bath Protective Media Aqua Stabil PHMB Free 12 x 100ml Julabo 8940012GB

The JULABO water bath protective media 'Aqua Stabil' stops the growth of algae, bacteria and other microorganisms with its bactericidal effectiveness. It protects the bath fluid and provides a long period of use for the fluid.
Water protective media, 6 bottles each 100 cc
This accessory are suitable for the following JULABO products:
SW22, SW23, TW12, TW20, TW8, TW2, ED, ED-13, ED-13A, ED-19, ED-19A, ED-33, ED-5, ED-5A, ED-5AB, ED-5M, ED-5MB, ED-7AB, MB-13, MB-13A, MB-17, MB-19, MB-19A, MB-5, MB-5A, MB-5M, MB-7A, ED-39, EH, EH-5, EH-13, EH-19, EH-27, EH-33, EH-39, ED-13M, ED-19M, ED-27