bulging eyes is probably popeye.
Quarantine her, You can try treating with 1/2 tsp of epsom salt per gallon to see if she improves. If not I recommend you try using a broad anti-bacteria like jungles fungus clear which can be bought at walmart, it treats bacteria and fungus infections. Bump the temperature to 80F, it helps too.
there are some problems with your care though:
popeye is usually due to ammonia poisoning, your cleaning your filter regularly so your tank is probably not cycled. Cloudy water could be other indicator. How often do you change the tank water?
You have lots of fish, so your 30 gallon probably needs a 50% water change every week.
I would buy a test kit instead of using strips, they are not accurate at all. Try researching the nitrogen cycle on google. You can also read about it here
. your tank is huge so its probably good to cycle it.