Betta Fish Floating On Side At Top Of Tank

My little sister's betta fish is floating at the top of his tank on his side. He is having trouble swimming down so I am guessing it is swim bladder, but I don't know what to do. His water parameters are A-OK, and he was alright just the other day. I noticed a little black at the edge of his

Why Is My Betta Fish Floating To The Top And On Its Side? 10 Reasons

Swim Bladder Disease in Betta Fish: Symptoms & Treatment

Help Beta Fish Floating On Its How Do I Help Him? R/ Bettafish

HELP! Betta floating at top of tank, he sinks sometimes and tries to move around but is struggling. Is there anything I can do? Got on Thursday and hasn't eaten. : r/bettafish

Why Is My Betta Fish Floating To The Top And On Its Side? 10 Reasons

swim bladder in fish and how to cure

Why did my beta fish stay not moving on the bottom of the tank for days, even after tapping the glass, then suddenly start swimming again? - Quora

New PETA Exposé: Filth, Sickness, and Death for Betta Fish at Petco

Why does my betta fish keep spending most of his time at the top

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health - How can I help my betta, who has a white-ish sore on his side, is laying at the bottom of the tank, and isn't eating? - Pets Stack Exchange

Need help, betta fish keeps floating on his side?? : r/bettafish

Swim Bladder Disease In Bettas & Other Causes Of Sideways Swimming

Betta Fish Floating On Its Side At Top Of Tank