Crystal-like features of the endothelium were noted by Kraupa in 1920, who suggested that the epithelial changes were dependent on the endothelium. Using a slit lamp, Vogt described the excrescences associated with FCD as drop-like in appearance in 1921.uchsâ corneal endothelial dystrophy (FCED) is a degenerative disease of the corneal endothelium with accumulation of focal outgrowths called guttae (drops) and thickening of Descemetâs membrane, leading to corneal edema and loss of vision.
Tropical fish are those that require heated water, generally in the range of 75-80Â°F (24-27Â°C). Because many homes are not kept in that temperature range day and night, these fish require a heated aquarium.old water fish do better in temperatures well below that, some of them enjoy water well below 70Â°F, which is not suitable for any tropical fish. Ultimately the best temperature will depend on the species of fish in the aquarium.
Room temperature is fine for the goldfish, keeping in mind that if the temperature in the room goes up past 90 degrees, so will the temperature of the water. Keeping the ambient temperature down around 70 degrees is perfect for year-round goldfish health.old Water. Goldfish love a refreshing swim and will actually perk up and swim faster when fresh, cool water is poured into the tank. Changing out a quarter of the water from time to time with some that is many degrees cooler is perfect for the goldfish.