Waterlife Nova+Using the natural positive effects of tea tree, Nova+ treats parasites such as trichodyna, velvet, chilodenella, gill and body flukes, bacterial infections such as finrot and wounds. Notes: Suitable for tropical freshwater and coldwater aquaria. Do not use simultaneously with other products. Allow at least 48 hours to elapse before changing product. Do not use within four days of Myxazin or Protozin. Directions: Leave biological filtration running.