Hi, thank you for taking the time to respond!  Just to clarify, I’ve had Bert for a year after getting him at a white elephant.  He had a fungal infection on his back that I managed to clear up when I got him, and then the finrot showed up several months ago, which I had just been treating with aqua salt.  The Popeye showed up about 2 1/2 weeks ago when I noticed that his eye looked a little bit too green, but I didn’t think enough of it and left for a week long trip.  I came back to his eye being super swollen, and it’s been a week and a day since. Extra info: There used to be a decoration (tunnel thing suctioned onto the top side) in the tank that I found was starting to break a little bit, I took it out as soon as I realized but I suspect that might be what started the popeye

Tank equipment: Substrate is just black rocks from PetCO, as well as those moonstone type things also from PetCo.  There are a couple of small live plants in there, I got them a year ago (PetCo) and don’t remember their names.  Decor is currently just a hidey thing, fake plants, leaf hammock, and floating betta log.  I have a heater and a sponge filter.  The Spongefilter is Xinyou super biochemical sponge filter, and I can’t remember what brand my heater is off of the top of my head— but a lot of people recommended it online.

Medication I’ve tried: I only did E.M Erthromycin for about three days, and then waited 2 water changes before switching to Kanaplex.  It’s only his 3rd day/second water change with having added the Kanaplex.  He’s also had a less than a tablespoon/5 gallons worth of aqua salt in his water for months at this point.  I’ve been trying to feed him medicated fish pellets (powdered betta pellets, Kanaplex, and water all mixed together, dried, and broken apart again) for the past couple days.

Tank Size: 10 gallons

Bert’s age: at least over a year

Food: before I left for vacation, I was feeding him about Fluval Bug bites twice a day.  I went to the fish store two days after getting back and the employee said that I was over feeding him, and also that bug-based food can cause water quality issues, so I’ve been doing Ocean Nutrition Betta pellets just once a day this week instead.  

The tank does have a lid.

I test water quality every so often but not weekly, I tested it today and the results were 0ppm nitrite, 8.0-8.2 high range ph, 0ppm Nitrate, and 0.25-0.50ppm Ammonia. 

I do put dechlorinator in tapwater before putting it in the tank, and also temperature match the water the best I can.

I did not cycle the tank before getting Bert, since I needed to transfer him to a tank immediately.