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.
The best water temperature for your Betta fish is within a range. Bettas are tropical fish and so they like their water a little warmer-but not too warm. Consistency in water temperature is also important. The optimal range of water temperature for your Betta fish is 74 -78 degrees Fahrenheit.