Palintest Ammonia Conditioning Reagent is required when testing sea water or brackish water for ammonia. It prevents salts precipitating in the sample, which would otherwise interfere with the result. Supplied as a powder in a pack with a built-in measuring spoon: add one level spoonful to the 10 mL sample and mix to dissolve before adding the Palintest Ammonia photometer tablets (AP152).