I've had one fantail for the last 4 years. They are a difficult fish to keep as they have ongoing swimbladder problems and pick up internal infections very easily.
Do not even contemplate on putting 4 of them in a tank smaller than 150 litres. They need a lot of room and I only have one, and its in a 112 litre tank with 3 other large type coldwater fish.
If you have not already bought these fish, I personally would suggest considering different fish. They are hard to keep and are subject to bullying by other fish.
Hope I've helped!
Fantail fish usually have four mates.
A 12 by 27 hex fish tank holds approximately 30 gallons of water when filled to capacity.
You need about one gallon for every inch of fish you have
2.25
A Betta fish generally needs a minimum of 2.5 gallons of water in its tank to thrive. It is important to provide adequate space, filtration, and water quality for the well-being of the Betta fish.
Truman Lake in Missouri has about 11.32 million gallons of water in it. There are several types of fish in the lake as well.
That would be appoximately 45 gallons, but its probably slightly less than that due to the thickness of the glass and the trim(if they is trim.
34.6 Gallons (131 Litres) :)
A good rule of thumb for fish placement is to try and equal inches of fish to gallons of water.
A 60x20x20-inch fish tank holds 104 gallons.
40 liters equates to 10.5669 US gallons.
Answer: 11.1 x+2.4=13.5 13.5-2.4=11.1