JBL Biotopol 250ml Neutralizes toxic heavy metals Conditions tap water quickly Noticeably protects the mucous membranes For every water change and all new tanks Vitamin B complex to reduce stress in fish JBL Biotopol conditions tap water quickly to convert it into biotope aquarium water and noticeably protects the mucous membranes, gills, skin and fins. It can be used for every water change and all new tanks. JBL Biotopol neutralizes toxic heavy metals (e.g. copper) and chlorine, additionally the Vitamin B complex has been proven to reduce stress in fish. With Aloe vera plant extract to protect the mucous membranes of the fish.