They are nice fish I have had a couple over the years. her eye is cloudy for a reason it is injured. a injured eye goes cloudy because a very fine skin grows over the eye so it can heal, or she is going blind in that eye as it is dieing it goes cloudy. Going blind in an eye is normally not the case. A fish will cover it body with a film to protect it from some thing affecting a part of it or some thing in the water. A fish will also product a slime coat to try and protect its self from disease.

your alk is low what is you dkh at now? Ca being low would not do this. I would ting there has to be some thing else wrong with the tank or she has some thing, to stress her out like this.