The short answer: 2-3 years is most realistic. If you are really good to them, its possible they’ll live up to 5 or more years.
A longer answer: The first thing you should know is that your betta fish is probably a year old when you bought it. It may have been even older. Betta fish take at least six months to fully develop those beautiful fins, so pet stores don’t even try to sell them until they’re 9 months old or so, and then you lose a few months to transit time and how long it takes for someone to buy them in the store.
If you want to keep your betta as long as possible, get it a tank that’s at least 5 gallons. Heat the water in the tank to about 78 degrees. Change the water frequently & get an ammonia test kit to be sure the water never has even trace amounts of ammonia in it. Treat your tap water before you put it in the bowl. Do not overfeed your betta, and when you do feed, give them high quality, high protein food like freeze-dried brine shrimp or freeze-dried bloodworms. Have only the betta fish in the bowl, or carefully select very non-aggresive fish as companions.
If you follow those guidelines, your fish should live at least 2-3 years, and might be lucky enough to make it to the wise old age of 9.
Betta fish kept in small (less than 3 gallon), unheated, unfiltered bowls will be lucky to live two years. These conditions are stressful to the betta and compromise their health over the long term. A small bowl also greatly limits how much exercise they can get, and exercise has been directly linked to betta fish longevity.
In a university study, graduate students actually “chased” bettas around their tanks to get them to move about. They did this every day for years, and the bettas that got the exercise lived 9 years or more, compared to the inactive bettas that died around age 4-5 years. This doesn’t mean that chasing your fish or traumatizing it is a good idea – it means that giving the fish at least a full foot to size back and forth in is going to help. Some small aquariums have very gentle filters that some betta fishes swim into to get exercise, sort of like a fish treadmill.
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hi, i recently got a betta, his name is bubbles, and rents said i needed to research alot, i looked on your website and i learned everything i needed to know. before he didnt look to happy, but when i read your tips he really perked up alot! i really love you site!! i do have a qustion, i first started out with a 5 gallon with a heavy dudie filter, after a week or two, it got really, realyy dirty, i dot know how to maintain it, and i can not keep on changing the water every week or so because it is way to big. right now he is in a two gallon, will he be ok in that 2g forever or do i need a solution to straightenout that 5g?? please help!!!
Hi Jade. I’m really glad the site was helpful.
The 2 gallon is perfectly OK, but he will be happier in the 5 gallon. They both need to be heated, too (its snowing here… really reminds me about the heating issue).
If you’re going to keep the 5 gallon, its definitely worth the time to figure out how to clean the filter. Do you know what kind of filter it is? For example, is it a clear plastic box that sits in the corner, or does it hang off the back side of the tank and has an intake tube that pulls the water up into it?. If you can find out the manufacturer & the model number (or even the model series), I’ll look around and see if I can’t find instructions on how to clean it.