Wunder Formalin 5% 50ml

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Effective for use on skin & gill Flukes and many other external Parasites. Use with CAUTION. Key Features: Effective treatment for external parasites Formalin can burn sensitive sp ecies and is HIGHLY TOXIC to all fish in overdose. Provide good aeration during treatment, monitor fish for signs of stress and add freshwater if required. 3ml per 20L Show more