Sera toxivec is a toxin remover that takes immediate effect reliably removes ammonium chlorine chloramine and nitrite prevents algae growth and reduces how often you have to change the water sera toxivec at a glance prevents algae growth binds heavy metals reliably removes ammonium and nitrites reliably removes chlorine and chloramine reduces how often you need to change the water protects fishs skin stabilises the carbonate hardness and ph balance brings down high nitrate values dosage g