setting up a siamese fighting fish tankBettas may have first entered the United States in 1910, via importers in California; there is also proof they were imported in 1927 from Cambodia. While it is unclear when bettas became usual in the aquarium trade, the early 20th century marked the first known departure from centuries of breeding bettas for aggression, to in its place choosing for colour, finnage, and basic beauty for ornamental purposes. In 1927, an article was posted in Germany describing the long, flowing fins of the “veiltail” breed, which suggests an emphasis on aesthetic beauty. In the 1950s, an American breeder created a larger and longer finned veiltail, while around 1960, Indian breeders found a genetic mutation that allowed for 2 caudal fins, producing the “doubletail” variety. Within that decade, a German breeder created the “deltatail” characterised by its broader, triangular fins. Bettas are also affected by the pH of the water: a neutral pH of 7.