Help, my 8" Tancho Kohaku has an eye problem. I cant decide if its "cloudy eye" or "sunken eye". Not sure how this happened. My water parameters come up good with no ammonia, no nitrite, and a 7.5 pH. What is shocking is that it's only one eye as the other eye is perfectly normal. This fish also appears healthy as it swims around and eats very well. I guess my question is, would my fish recover from this? And what is this eye problem called? I've treated it a bit already with melafix and salt. Please share any inputs/recommendations. Thank you.