Afterall, more than 700 million people visit zoos and aquariums worldwide every year, and biodiversity is still in decline. In a 2011 study, researchers quizzed visitors at the Cleveland, Bronx Treatmentin a fish tank: If you are using methylene blue as a general detoxifier against nitrite, ammonia, or cyanide poisoning, for general disease prevention or to keep fish eggs safe from fungal infections, typically 1 teaspoon of methylene blue is added for every 10 gallons (37.8 liters) of water, or 10 drops per gallon (3.78 liters). 2 Common Goldfish. Veterans often warn new fish keepers to stay away from goldfish because they get so large, but they're still a great beginner pet because they're very resilient and easy to care for. Common goldfish ( Carassius auratus) grow to about 12 to 14 inches, so they require 30 gallons of water per fish (or two goldfish in a 55 Theyhappily splash about in the aquarium during feeding time. Is it cruel to catch and release fish? It's called catch-and-release fishing and it's cruel. Studies show that fish that are caught and returned to the water die of shock. The fish have to be a certain size. You can't keep fish in the water without returning them. You can Re is it cruel to have just one goldfish? #5. IMO 20gal is too small for any breed of goldfish. A minimum tanksize for goldies would be 30gal. For singletails, the minimum should be upwards of 55gal for 1. They're more ideally suited to ponds. For a 20gal tank, you could have a nice shoal of tropicals. 3 Rainbow Shark. Sometimes referred to as Ruby Sharks or Red-Finned Sharks, these creatures offer a nice pop of color to any freshwater tank. Like the Red Tail Shark, the Rainbow Sharks have a fiery red tail that stands out against a natural backdrop. However, these fish also have bright red fins. 7TDl.

is it cruel to keep fish in aquarium