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Typically, it is recommended to have only one betta fish in a 30-gallon tank to ensure they have enough space and territory to thrive.
you can put two girl bettas in one tank but not the males
Fish are usually most comfortable when you house them one fish per gallon. Female bettas, unlike the males, don't really have any restrictions on how many individuals you have as long as you adhere to the one per gallon philosophy.
The basic rules are :- 1 inch of fish needs a minimum of 1 gallon of water. :- every tank needs a permanently running filter. :- every fish tank need to have at least 50% of its water changed every week. Follow those rules and you should be OK. A female Betta is about a 2 inch fish. Your 16 gallon tank will actually contain less than that because no tank is ever filled to the brim so assume it actually is holding about 14 gallons. This would give you an absolute maximum of 14 inches of fish which in the case of female Bettas would be a maximum of 7 fish. I would say a responsible stocking rate for that tank would be 5 female Bettas.
You can fit one betta in a 1 gallon tank, but nothing else.
The bigger the better-- despite popular belief, bettas do not prefer or thrive in small amounts of water! Bettas should never be kept in less than one gallon, but the ideal tank is at least five gallons large.
AnswerI think it should be 10-20 gallons.You can breed Bettas in a tank as small as 5 gallons, however, if you use a 20 gallon long, you can leave the fry in the same tank until they need to be jarred.
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Bettas have a lot more personality than guppies, and require less space (5 gallon+). However, I have had boredom and tail biting issues with mine, so I had to upgrade to a 10 gallon tank with pygmy cories to stop him being bored. This is a risky move as many bettas are aggressive and won't accept tank mates. Guppies require 10 gallon+ tanks, and are stunning creatures. However, they are less intelligent and have less personality than bettas. Both fish require a heated and filtered tank, and no matter what you decide it is of upmost importance that you do a fishless cycle to create a healthy bacterial colony before you add any fish. Without doing this your fish will be in pain from ammonia and nitrite spikes and may die.
One ft per 20bbls of fluid
Depends on the size of the tank and the miles per gallon that vehicle gets. I have a truck that will travel 15 miles on one gallon, and a sedan that will travel 30 on the same gallon. I have one truck with a 10 gallon tank, another with a 20 gallon tank.