I have had my Betta for three days and it has been sick for 2 of them. I don't think that I am the cause of this, but I want to fix it. It's the second one that I have gotten from this large chain store, and probably the last.
I have him in a 1.5 gallon aquarium. I used special Betta drops to dechlorinate and I also used a pH corrector to keep the pH at 7. I also had a small charcoal filter going until the fish swam into it, now he has none.
So, the next morning after I got him I noticed that his tail looked ratty. I assumed that either he bit it or it got caught in the filter. OK, I assumed it would heal. He continued to eat. Later that evening, there was a white, transparent, cotton ball appearing form on the spot where his fin was damaged.
I was searching online and came to the conclusion that it was fungus. Several websites suggested to do a water change and add aquarium salt. So, I did that. Also adding the usual mixture. The white puff seemed to grow.
This morning I looked at him, thought I was going to have to flush him, and then he started swimming again.
I don't want to give up on him, but I'm not prepared to spend a ton of money. My husband thinks I'm crazy. The fish doesn't seem to like the salt, so before work this morning I emptied some out and replaced it with fresh un-salted water.