I have a betta that had been in a 5 gal cycled tank his tail fin started to look ragged-aquarium salt and water changes didn’t change his tail condition, he was still eating, swimming. I used Fungus Cure. I had cycled a 10 gal tank over about 1-2 mths. Tested water frequently and did partial water changes so I moved him to the new tank. pH was 7.6 ammonia 0 nitrite 0 nitrate 5. GH and KH were both 6. Within a few days he started to act lethargic, tail fin looked worse, not ragged but smooth where it fell off. I moved him to a 2.5 gal tank m, started Kanaplex and added Jungle Cure (he developed white around his mouth looks like he drank milk) two days ago. Tomorrow is third dose of Kanaplex (every other day). I am adding seachem prime on the in between day since it is a 2.5 gal tank (filled only 2 gal full because he is so weak and I want him to be able to get to surface) with a sponge filter (rigged with an air stone inside. I do a 50% water change every other day before adding Kanaplex, and did redose the Jungle Cure when I changed water yesterday. There is no improvement in him. He stays at the bottom of the tank, like he wants to fall over, if I put my hand in the water, he swims very spastically for a second or two and drops to the bottom of the tank again. Needless to say he isn’t eating (hasn’t eaten in about 1 week). He has a heater in tank set to 78F. Now what? I bought Betta Revive. Do I switch medication or wait?