About 2 weeks ago I went with my little sister to the pet store to pick out a fish. She picked out a blue betta male and him Mimi. She loves him so much, but I have noticed some things that are wrong. He used to be a beautiful blue, and now he is turning white around the face, and brown on the tips of his fins and stomach. He is also very sluggish and lies on his side a lot. He doesn't eat his food. I only got him 2 weeks ago! Please help, he means so much to my little sister, here is some more info:
He lives in a 1 gallon, plastic bowl. There is colored gravel, a fake plant, and a thermomator. The average temperature in his bowl is about 70-75 degrees. He has no heater or filter. I feed him two pellets of Top Fin - Color Enhancing Betta food a day. They usually sink to the bottom of his tank because he does not eat them. He doesn't poop either. Like I said, he is becoming strangely discolored. This fasting and very low energy might be because it's two cold, but I'm not sure, and I don't know how to raise the temp. without a heater. My little sister and I change Mimi's water about every 4-5 days. I don't what is happening! Please respond I need to save Mimi's life or my sister will be devastated. I'll be pretty sad too. Thank you so much for reading this, it means a lot to me. I really hope you respond because I don't think Mimi has much time left.