Why is my betta not eating, lethargic, and dull, even with good water?

Question

My betta fish is no longer eating and is lethargic and dull in color. He lives in a 10gal tank which is both heated (80 degrees) and filtered. He isn't interested in me or any food I try to offer him, and it's been like this for a few days, with the no eating issue going on for about a week. I have tested the water and there are no issues with it, and a water change was completed shortly before he started acting funny. I've only had him for a year or so, but I bought him as an adult. Pet's info: Fish | Unknown - Fish | Male | unneutered

Angel Alvarado, LVT · Accepted Answer

If everything is within normal limits, try soaking the pellets in some garlic juice to stimulate his appetite. If possible, turn down the flow of the filter to reduce any strong currents. Fast moving water can be stressful to Bettas who prefer slow moving water. A bit of plain aquarium salt (NOT table salt or Epsom salt) can act as a general tonic to reduce stress, improve gill function, treat minor infection and aid in any recovery. Dissolve up to 1 teaspoon of salt per gallon of water in a cup of tank water and gently pour it into the tank. Treat for 10-14 days then reassess his condition. Partial water changes can be done to decrease salinity afterwards. Be sure to use aged or conditioned water that is temperature matched to prevent further stress or shock.

Why is my betta not eating, lethargic, and dull, even with good water?

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