I read in a book that slimy patches on the body usually denote bacterial infections, but may also represent advanced infections from protozoans and flukes. In most cases, an antibiotic will work, but you may want to combine it with a treatment for protozoans. Cloudy eyes are usually because of poor water quality, low pH, or high ammonia levels. Hope that helped! The book was A Guide to Freshwater Aquariums, by Mike Wickham.