Abstract: A therapeutic method for treating diseased or injured fish or other aquatic animal includes administering to the fish or other aquatic animal an amount of Pimenta extract selected from the group consisting of Pimenta racemosa and Pimenta dioica sufficient to promote recovery of the diseased or injured fish or other aquatic animal. Also disclosed is a prophylactic method for treating a disease-free fish or other aquatic animal, including adding to water containing or to contain the fish or other aquatic animal Pimenta extract selected from the group consisting of Pimenta racemosa and Pimenta dioica in an amount effective to promote resistance of the aquatic animal to disease. An aqueous emulsion containing Pimenta extract oil in water, where the Pimenta extract is selected from the group consisting of Pimenta racemosa and Pimenta dioica is also disclosed for use in these methods.

Abstract: A therapeutic method for treating diseased or injured fish or other aquatic animal includes administering to the fish or other aquatic animal an amount of Pimenta extract selected from the group consisting of Pimenta racemosa and Pimenta dioica sufficient to promote recovery of the diseased or injured fish or other aquatic animal. Also disclosed is a prophylactic method for treating a disease-free fish or other aquatic animal, including adding to water containing or to contain the fish or other aquatic animal Pimenta extract selected from the group consisting of Pimenta racemosa and Pimenta dioica in an amount effective to promote resistance of the aquatic animal to disease. An aqueous emulsion containing Pimenta extract oil in water, where the Pimenta extract is selected from the group consisting of Pimenta racemosa and Pimenta dioica is also disclosed for use in these methods.

Abstract: A method of treating an injured or diseased aquatic animal by adding an emulsion of cajeput oil to water containing the aquatic animal is disclosed. Effective amounts of cajeput oil which promote recovery from bacterial or fungal diseases, or from wounds, abrasions, or burns, range from 0.001 ml to 1 ml of cajeput oil per day per 10 gallons of water. The cajeput oil emulsion can also contain 0.01% to 20% of an emulsifier, and up to 5% of a defoamer.

Abstract: A method for determining the concentration of dissolved oxygen in a water sample comprising the steps:(a) providing a water sample of predetermined volume, the oxygen content of which is to be determined;(b) mixing additives with the water sample to form a mixture, the additives comprising an oxidizable metal salt comprising a transition metal cation selected from the group consisting of scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel and copper, and an anion selected from the group consisting of an inorganic anion and an organic anion which, with the cation, results in a water soluble oxidizable metal salt, at least one water soluble alkali metal compound selected from the group consisting of an alkali metal oxide and an alkali metal hydroxide and at least one oxidation-reduction indicator capable of a color change upon oxidation of the metal salt;(c) preventing any substantial contact of the mixture with atmospheric oxygen; and(d) comparing the color of the mixture to a predetermined