The severum looks like it is covered in excess mucous, not white spot.
The red parrot cichlid looks like white spot but it's unusual to be only on the pelvic fins?
The cloudy eye can be from poor water quality or the fish damaged/ injured the eye and it is swollen up while it heals.
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Before you treat an aquarium, you should do a huge water change, gravel clean the substrate, wipe the inside of the glass, and clean the filter. Remove any carbon from the filter so it doesn't remove the medication.
Work out how much water is in the tank so you don't overdose the fish.
To work out the volume of water in the tank:
measure length x width x height in cm.
divide by 1000.
= volume in litres.
When you measure the height, measure from the top of the substrate to the top of the water level.
If you have big rocks or driftwood in the tank, remove these before measuring the height of the water level so you get a more accurate water volume.
You can use a permanent marker to draw a line on the tank at the water level and put down how many litres are in the tank at that level.
There is a calculator/ converter in the "FishForum.net Calculator" under "Useful Links" at the bottom of this page that will let you convert litres to gallons if you need it.