NTLabsPropolis ulcerwound sealer50mlPropolis is nature\'s natural defender, containing high potency bioflavanoids from bee propolis. This is a non-chemical product for use as a topical treatment for external wounds/ulcers. Propolis is suitable for use on all pond and tropical fish and forms a waxy coating upon contact with water.Directions: Dry the wound/ulcer area,apply the Propolis liquid over the affected area, blow the liquid dry for approximately 10 seconds then return back to the pond/tank. Repeat every 3-4 days until new skin tissue is evident. Do notapply directly on to gills or eyes.