Yesterday I noticed my betta Pablo in his little cave and not as active as usual. I did my normal vacuum and water change. Today, he's at the top corner with what looks like a stringy substance hanging from his back fins. I also see what could possible be a parasite from his anus.
Husbandry spec:
3 gallon, well cycled tank, heated and filtered, planted.
I test with strip but according to them, everything looks good.
https://www.reddit.com/gallery/1dyb1zq
Posted by Distinct-Forever642