i tried getting a pic but where the tank is the light isnt very good and the pics dont really come out well. The tank is 12 gallons, and there are 5 female CTPK bettas and one apple snail. Water changed was yesterday and everyone seemed fine then, ammonia 0 nitrites 0 nitrates 20
It looks like a blister over the eye, it doesnt appear to be pop eye, the eye itself doesnt look like its popped if you see what I mean.
dont worry guys have got a diagnosis from elsewhere. It apparently is pop eye, but more likely due to damage. will be treating with antibiotics