Slow and lethargic betta :(

[jimbob]

Ive been battling the fin rot from when I got my betta.
Ive done the salt treatment and water changes everyday, it did work for about a week then the blank gunk came back and his fins starting to get eaten away.

Ive now had to resort to a more invasive measure of a actual medication for it.
I bought Interpet anti-fungus and finrot treatment after huge success from their anti-whitespot treatment when I had an outbreak of it in my community tank

I dosed his tank with the amount it said to put in and followed its instructions.
He flipped out a bit a few minutes after I put it in so it stung maybe?
He has been fine but for these last few hours he keeps resting on the gravel and not really in the mood for dinner. He even put his nose up to a blood worm and he loves them.

Should I do a water change to remove the medication and chuck some carbon in the filter?

Housing
What size is your tank? 30 litres
What temperature is your tank? 28c
Does your tank have a filter? yes
Does your tank have an air stone or other type of aeration? yes
Is your tank heated? yes
What tank mates does your betta fish live with? none

Food
What type of food do you feed your betta fish? betta flakes, frozen blood worms & frozen brine shrimp
How often do you feed your betta fish? 4 blood worms, 4 brine shrimp or 4 flakes twice daily

Maintenance
How often do you perform a water change? twice weekly

What percentage of the water do you change when you perform a water change? 25%
What type of additives do you add to the water when you perform a water change? API stress coat

Water Parameters:
Have you tested your water? If so, what are the following parameters?

Ammonia: 0
Nitrite: 0
Nitrate: 5
pH: 7
Hardness:
Alkalinity:

Symptoms and Treatment
How has your betta fish's appearance changed? Eroding fines
How has your betta fish's behavior changed? Slow and lethargic, not interested in things
When did you start noticing the symptoms? about 6pm GMT+0
Have you started treating your fish? If so, how?
originally had fin rot when received him, treated with salt and daily water changes. Now interpest no 8
Does your fish have any history of being ill? Fin rot.
How old is your fish (approximately)?

[ChoclateBetta]

Flakes not good.

[Roemgie]

Originally Posted by ChoclateBetta

Flakes not good.

I agree, I only feed my boys either LifeSpectrum pellets or frozen bloodworms (obviously thawed before fed to them)

[ChoclateBetta]

Bloodworms should be fed weekly.

[shellieca]

It seems odd that clean, conditioned, temp matched water isn't helping the if rot. IME that's always worked. I just did normal water changes & they'd heal up. I'm always leary of meds. How long have you had him? Flakes are fine if they're good quality.

[ChoclateBetta]

IAL and Aquarium salt are great.