High Ammonia in QT = not good

[hawk]

In a 10g qt with no filtration, daily water changes will be needed. Don't overfeed, siphon waste and un-eaten food whenever you see it. In such a small tank a turkey baster makes it pretty simple. Keep the lights off, which will help keep the ph on the low side. A lower ph will reduce the toxicity of the ammonia. Good chance the cloudy eye is a result of poor water quality. Frayed or white cloudy fins are another sign. Is this a new fish?. For next time try keeping a couple of cheap sponge filters in the sump, they can be used for emergency filtration when needed (the sponges need to be in the sump a few weeks or longer to be effective)