Furthermore, it removes aggressive chlorine from tap water. It also acts against residues of disinfectants or medicinal substances used. However, Sera Toxivec does even more: it reliably binds toxic heavy metals such as copper, zinc, lead, or even mercury. This way, these pollutants can no longer pose a threat to the fish as well as the beneficial bacteria in the biofilter. The number of water changes is thus reduced. If necessary, meaning in cases of particularly high contamination levels, Sera Toxivec easily allows for a higher dosage. A second application after one to two hours is also possible.