Fishing fruit acid usually refers to food-grade fruit acid, common ones include citric acid, malic acid, etc. The correct use of fruit acid can improve the fishing effect. Here are some common methods: 1. Dissolve the fruit acid in warm water, and then soak the fishing bait (such as earthworms or oatmeal) in the solution to fully absorb the fruit acid. Increase its baiting effect. 2. Mix the fruit acid with the bait, make it into granules and put it into the water, so that the fish can absorb the fruit acid during the eating process, increase their appetite, and help bite the hook faster. 3. Apply a layer of fruit acid solution on the fishing line to make it easier for the fish to feel the presence of bait when biting the hook and increase the chance of biting the hook. It should be noted that caution should be used when using fruit acids to avoid excessive use. Excessive use of fruit acids may cause over-excitement of the fish or damage the oral mucosa of the fish, affecting the fishing effect. Before using fruit acid, you should first understand its properties and dosage, and make appropriate adjustments according to the actual situation.