Betta finrot salt treatments

Hello I have recently saved a betta fish from a store where he was sitting in his own poop and old food. I noticed he was suffering from some mild to minor fin rot and looked very dull when I took him home I put him into one gallon of fresh water heated water and the next morning he was looking a bit better. His fins still looking bad but he looked hopeful. I started the slt water treatment to help cure his fin rot the treatments supposed to last a week but he’s been in there five days and I’m worried. His finrot hasn’t gotten worse I think it’s better but he started shedding these long wispy strings of what looks like slime or his slime coat coming off his fins and looks like his gills. Should I be worried ? I was going to finish the treatment in a couple days and put him into a cycled 3.5 gallon heated tank but maybe I should stop the salt treatments now and put him in the new 3.5 gal tank. I treated one other betta for finrot the same way and he didn’t have the same slime stuff falling off so idk if it’s normal or is I should be worried.
What is the water volume of the tank?
- 1 gallon temporary set up
How long has the tank been running?
-less than a week
Does it have a filter?
- no
Does it have a heater?
- yes
What is the water temperature?
-78 Fahrenheit
What is the entire stocking of this tank? (Please list all fish and inverts.)
- just one betta
Maintenance
How often do you change the water?
- water change everyday
How much of the water do you change?
-100%
What do you use to treat your water?
- nutrafin aquaplus water conditioner and API aquarium salt
Do you vacuum the substrate or just the water?
- just water

*Parameters - Very Important
Did you cycle your tank before adding fish?
- not cycled because I’m doing 100% water changes daily
What do you use to test the water?
-tetra easy strips 6 in 1 and ammonia test strip
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia:0
Nitrite:0
Nitrate:0
pH:6.2 ppm

Feeding
How often do you feed your fish?
- once a day
How much do you feed your fish?
- 4 little pellets
What brand of food do you feed your fish?
- zoo med betta buffet pellets
Do you feed frozen or freeze-dried foods?
- not yet

Illness & Symptoms
How long have you had this fish?
- 6 days
How long ago did you first notice these symptoms?
-when I bought him he had mild fin rot and I wanted to help him
In a few words, can you explain the symptoms?
- some holes in fin and streaks of goopy gel coming off of his fins and gills
Have you started any treatment for the illness?
- he’s been in salt water treatment for five days ( 1/2 tsp salt to 1 gallon water)
Was your fish physically ill or injured upon purchase?
- yes when I bought him he was looking dull with some rips and tattered fins
How has its behavior and
appearance changed, if at all?
- he looks brighter and swims more just keeps getting goopy stringy stuff falling off

 

Those fins don't look too terrible of shape. Maybe try without the salt for a few days?

 

I just did his water change without salt in it and he looks a bit clamped up and like he’s having some trouble breathing maybe I hope he’s okay and the fresh water didn’t shock him too much I turned his lights off and I’ll see how he looks in the morning I hope he does ok

 

I would move him over to the cycled 3.5 gallon tank asap, that way you can just do WCs every couple of days for the fin rot instead of a 100% WC daily, which would be incredibly stressful for him. He's likely clamping his fins because of the stress from the huge WCs and constantly being moved around.

 

I would move him over to the cycled 3.5 gallon tank asap, that way you can just do WCs every couple of days for the fin rot instead of a 100% WC daily, which would be incredibly stressful for him. He's likely clamping his fins because of the stress from the huge WCs and constantly being moved around.

He’s looking better today I’ll definitely put him into the 3.5 gallon as soon as I can it’s just at 82 degrees Fahrenheit and I wanna get it a smaller heater to keep it at a steady 77- 80