Help Me, Please

[Alexandria]

I think my guppy fish, Cockatiel, has fin rot. He had a perfectly round tail when I got him about a month ago. Now his tail looks like something took a bite out of it. I haven't gotten new fish yet, so I'm wondering if it's possible that the stress of being alone caused it? I have a plan- but I wanted to get some input on the steps I plan to take.

1. Move his tank to a sturdier location (it's on top of my dresser and wobbles a little bit when I get into it, I think it may stress him out)
2. Check the water (My local pet store will check it for me if I bring in a sample)
3. Get medicine for him and dose it properly
4. Get tankmates as soon as I know everything is healthy.

Any advice on anything else on what else I should do?

I'm so worried.

 

[SassyHippo]

Consider aquarium salt first and maybe temp increase, then a medication if that doesn’t work. Research it first, don’t just take my word. Keep the water super clean for a while.
When you get new fish, quarantine them in a different tank to ensure they’re healthy before possibly getting your boy sick again. Of course ensure he’s well first as well.

 

[jake37]

Probably not rot esp if it happened overnight. Do you have anything in the tank that he might have snagged it on ? Btw tails do grow back.