Ideally it would be in hundreds or thousands of gallons of shallow marshes in the wild, contrary to popular belief that they thrive in puddles. 5 gallons is considered the minimum by most hobbyists, and the cost difference between 5 and 10 is minimal so I personally recommend 10+ gallons for any new fish keeper. You will have much more stable However, you should never completely remove all of the water. This can shock your betta fish since they have adjusted to the water parameters in their aquarium and completely changing the water is stressful for them. Instead, you want to do partial water changes. This is usually a 10% to 25% water change every week or when necessary. How much does a Betta fish cost? Betta fish cost roughly 4.99 to 12.99 depending on which breed you are getting. A splendid female Betta costs around 7.00 and a splendid male Betta costs around 6. The width of your chest determines how much space you have for the fish to swim around in. The wider your chest, the more space you have. The final guideline is weight. Like with any other pet, the heavier the better. Fish are no different, and with heavier fish, the less likely they are to become sick or injured due to over-exertion. Finding Betta Cambodia. At Finding Betta Cambodia, no matter what the application, from the smallest water tank aquarium feature or large scale commercial projects, we have everything you need including technical support from start to finish. On top of that, we have varieties of products and accessories to help you build your desired water How Much Do Elephant Ear Betta Cost? Image Credit: panpilai paipa, Shutterstock. Like most betta fish, the Elephant Ear betta doesn’t cost much. You can find them for anywhere between $10 and $20, depending on the color variations that you choose and where you purchase them from. The cost of breeding betta fish will vary depending on the specific needs of the breeder, the size of the fish colony, and the specific breed of betta fish being bred. However, a ballpark estimate would be that the cost of breeding betta fish ranges from $10 to $30 per fish. There are several good choices to house your betta with other fish. Here is a list of seven of the safest and most compatible Siamese fighting fish mates: 1. Otocinclus Catfish – These peaceful bottom-dwellers are great for keeping algae under control and won’t compete with your betta for food. 2. 3.5 Gallon Tank. A good size for a Betta tank if you want a little more space. With 3.5 gallons, you can fit most hang-on-back filters and even heaters. Although you can technically make a planted tank out of a 2.5-gallon, it’s easier to do with a 3.5-gallon. According to the website BetaFacts.com, the cost of a betta fish can be anywhere from $2 to as much as $1,000. Types of Betta Fish. Price Average. Blue Betta. $3 to $6. Butterfly Betta. $18 to $30. Dragon King Crown Betta. $30 to $40. 6lsnHu.