Seachem Cuprisorb F+SW Juwel Lido Aquariums High levels of nitrate are

High levels of nitrate are a food source for unwanted algae and can indicate poor water quality

2m Power Usage - watts 34 dba

With its live beneficial bacterial culture

Key features: Live concentrated bacteria culture gel sticks to the filter media allowing the nitrifying bacteria it contains to rapidly colonise your filter beneficial bacteria within the gel will speed up the maturation of your filter media helps to convert ammonia and nitrite that results in less stressed fish

Seachem Cuprisorb F+SW Juwel Lido Aquariums High levels of nitrate areCupriSorb is a narrow spectrum, synthetic adsorbent based filter material for removing copper and heavy metals from either freshwater or marine water. It extracts all types of copper, including chelated copper, and remains effective until it turns a deep blue black colour. It may be regenerated repeatedly. If placed in continuous service, it will gradually extract even precipitated copper and make invertebrate culture possible in tanks previously