My betta fish is sick: clumped fins, white spots, won't eat. Help!

Question

I bought a betta fish at petco on Sunday. He seemed good, until today. I came home from work and I see he started making nest bubbles, but his fins suddenly look clumped and he has white and blue on his body. He looks sick. I don't know what it is and how to help him. He is in a 3.7 gallon tank alone. I put conditioner and biological booster in the tank. There is a filter and thermometer is reading 80 degrees. I have given him food pellets and he tries to eat, but spits it out. He was all red. Pet's info: Fish | Unknown - Fish | Male

Angel Alvarado, LVT · Accepted Answer

Check water chemistry. Elevated ammonia or nitrite levels can cause stress. Submit a sample for testing if you don't have a home test kit. Petco or a local fish store may do this for free or for a nominal fee. Partial water changes using aged or conditioned water that is temperature matched can be done until levels are below 0.25 ppm. If your filter has an adjustable flow, turn it as low as possible. Bettas do best in slow moving water. You can soak pellets in garlic juice to stimulate his appetite and boost the immune system.

My betta fish is sick: clumped fins, white spots, won't eat. Help!

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