My betta has this same problem with one eye. It looks really bad but only happened some time today. Water readings have all been fine and I did my usual partial water change on Sunday. Epsom salts is what i’ve been reading is the best way to treat it and i’ve already ordered some which is due to come tomorrow. Is there anything else I should do in the mean time.
Edit: Just did another water test and everything is fine still.
Edit: Just did another water test and everything is fine still.
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