Seachem CupramineThere is more than a four fold concentration gap between the minimal therapeutic dose (0. 2 mg L) and the toxic dose (0. 8 mg L). Cupramine is easily removable with chemical filtration. It is highly effective and safe in freshwater as well as marine water. Directions: Remove all invertebrates. Turn off UV sterilizer; remove chemical filtration. If the bottle has a dropper cap, use 20 drops (1 mL) per 40 L (10. 5 gallons*) the first day, wait 48 hours,
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