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.
How to tell when itâs cooked: Use a knife to pierce the fish at the thickest part and check the flesh, it should be barely opaque and slightly pink in the center. If you press with a fork, the flesh should begin to flake easily. Internal temperature reading from the thickest part should be at least 145Â°F (though this is debatable, Iâve seen references as low as 120Â°F and as high as 165Â°F, it depends on how well done you want it to beâ¦I prefer it heated to 135Â°F. The USDA recommends an internal temperature of at least 145Â°F for fish.).