Mark Horowitz Posted December 10, 2021 Share Posted December 10, 2021 I have a discus tank with cardinals and one of my cardinals has some cotton mouth. Any recommendations? Should I treat the entire tank with Paraguard or simply remove the fish? I am told that cotton mouth is highly contagious so treating the tank may be my only option. Is Parguard safe for Discus? Any advice would be helpful. Link to comment Share on other sites More sharing options...
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