Reddit mentions of Zoo Med Laboratories AZMBP5 Dial-A-Treat Food, 0.12-Ounce

Hey that's cool trick (my Raiku can do jumps through hoops too!) however, I would recommend getting a lid on that tank asap, especially since you taught him to jump. Bettas can and do jump out of the tank for any reason, and it's pretty risky to leave the tank open w/out a lid like that especially if you taught your betta to jump. There's many sad posts on reddit about a betta that jumped out of its tank to its death or if the owner was able to rescue the betta it still ended up quite injured from going out of the tank. https://www.reddit.com/r/bettafish/search/?q=betta%20jumped%20out&restrict_sr=1

Another thing I wanna bring up, it looks like you're feeding the betta with flake food?

Unfortunately, flake food is among the worst quality of foods for a betta (tons of junk fillers). I'd recommend a high quality betta pellet like NorthFin Betta Bits, New Life Spectrum betta, or Fluval/Nutrafin bug bites. You should also consider adding other variety of treat foods to give the betta a varied diet rather than them eating only the same thing for every meal day in and day out.

- https://www.amazon.com/Northfin-Food-Betta-Pellet-Package/dp/B00M4Q5DQ4/ <-- my favorite go-to betta pellet

- https://www.amazon.com/New-Life-Spectrum-Betta-70g/dp/B077MG4JR2/

- https://www.amazon.com/Fluval-A6577-Tropical-Granules-Medium/dp/B07194GD1F/

- Bloodworms with vitamins added: https://www.amazon.com/Hikari-Bio-Pure-Freeze-Dried-0-42-Ounce/dp/B00025K1GQ/

- ZooMed Betta Dial-A-Treat is a decent 3-in-1 treat wheel container which has 3 different treats for betta diet variety. https://www.amazon.com/Zoo-Med-Laboratories-AZMBP5-0-12-Ounce/dp/B003ZWCTZO/

- You can also try adding a vitamin drops to the food AND tank water - VitaChem Freshwater - Vitamin drops for aquatic animals - REFRIGERATION needed after first use/opening, to keep the liquid vitamin drops fresh. https://www.amazon.com/Boyd-Enterprises-ABE16708-Freshwater-Vitachem/dp/B00BS96V78

Beware of overfeeding, which is equally bad for bettas as underfeeding (they are gluttons and would eat till they burst if given the chance) https://i.imgur.com/4RR2LZ9.jpg. (save this pic for reference, feed betta as much as makes his belly match between 1st and 2nd photo, then let him digest back down to a normal belly before feed again.)

https://www.amazon.com/Zoo-Med-Laboratories-AZMBP5-0-12-Ounce/dp/B003ZWCTZO/ref=sr_1_20?s=pet-supplies&ie=UTF8&qid=1521480478&sr=1-20&keywords=betta+fish+accessories

If you can grab a 5 gallon bucket from the store (a clean one, to dedicate to the aquarium; can be used for water changes!) you can rinse the gravel in it; stir the gravel some to try to get any debris out and I usually dump the water (carefully so gravel doesn't get all in the sink) and rinse again a couple of times; the last time you add water you can add some Seachem Prime to dechlorinate it, and then add by the handful to the tank. I do think it was the right call to go ahead and add him.

For the swim bladder--I'm not an expert but I do know daphnia is supposed to be a good way to try to get his digestive system cleaned out. A lot of sites recommend peas but apparently they are not the best choice for bettas since bettas have difficulty digesting them. You can find daphnia either frozen, or in something called "Dial a treat". It can help to soak it in tank water before giving it to him. I think a lot of pet stores carry it. If you find that and try it and it doesn't help, make a post specifically about the situation (people will want to know parameters, which is temperature, ammonia, nitrites, nitrates). Hopefully being in clean water (you'll need to change probably almost daily while the nitrogen cycle establishes, aka "cycling") will help him heal. I'll keep my fingers crossed for him!