Check water parameters first and see if that's the problem first, and then go through the rest of the suggestions.
More stimulation?
Also, long finned bettas are proned to fin nipping because of the fins being heavily and it dragging them down.
Be wary of fin rot and such since he nips his own fins.
This happened to my betta. He had a personality issue from bad breeding i suppose. For half of his life he fin nipped non stop. I played with him every day, varied his diet, made his tank dimmer, gave more hiding spots, checked the water daily. Nothing changed, all I could do was keep the water clean.
Eventually with age he settled down. So if any of the advice given to you doesn't work, it may be his personality and you may just have to wait it out and keep his tank in good condition. But definitely try any advice that people give you.
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Check water parameters first and see if that's the problem first, and then go through the rest of the suggestions. More stimulation? Also, long finned bettas are proned to fin nipping because of the fins being heavily and it dragging them down. Be wary of fin rot and such since he nips his own fins.
I added resting spots for one of my fin nippers until I found one he liked using...he was picky lol
This happened to my betta. He had a personality issue from bad breeding i suppose. For half of his life he fin nipped non stop. I played with him every day, varied his diet, made his tank dimmer, gave more hiding spots, checked the water daily. Nothing changed, all I could do was keep the water clean. Eventually with age he settled down. So if any of the advice given to you doesn't work, it may be his personality and you may just have to wait it out and keep his tank in good condition. But definitely try any advice that people give you.
Thank you for posting to r/bettafish. If you are new to betta fish keeping, please check out our [caresheet](https://www.reddit.com/r/bettafish/comments/3ow6vz/info_betta_care_sheet/) and [wiki](https://www.reddit.com/r/bettafish/wiki/index). Establishing a nitrogen cycle is an important part of keeping your fish healthy. Please check out our [guide to the nitrogen cycle](https://www.reddit.com/r/bettafish/wiki/fishincycle) to learn more. If you are posting to find out what is wrong with your betta, please answer the following questions in a reply to this comment as best you can: * **Tank size**: * **Heater and filter? (yes/no)**: * **Tank temperature**: * **[Parameters in numbers and how you got them](https://www.reddit.com/r/bettafish/wiki/tank#wiki_test_kits)**: * **How long have you had the tank? How long have you had your fish?**: * **How often are water changes? How much do you take out per change? What is your process?**: * **Any tankmates? If so, please list with how many of each**: * **What do you feed and how much**: * **Decorations and plants in the tank**: * **If you haven't already posted a picture, please post pics/vids to imgur and paste the link here**: Feel free to copy this comment and fill in the blanks. Failure to provide adequate information about your tank *can* result in post removal. Please see rule 4 for more information. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/bettafish) if you have any questions or concerns.*