Top 6 Reasons Betta Fish Die
When Betta Fish Die Young
Betta fish are among the most popular freshwater tropical fish out there, and it’s easy to see why. They’re beautiful, with their flowing fins and brilliant colors. They’re mysterious, originating from far-off lands in the East. And, of course, they are very dangerous, having been trained in super-secret fishy fighting styles.
But no aquatic ninja skills can save bettas from the ultimate end that awaits us all. Ashes to ashes; fish flakes to fish flakes. One minute you’re swimming merrily along, the next you’re belly-up and stuck to the filter intake.
There is no escaping the Angelfish of Death. Unfortunately, for many betta fish it all ends far too soon. If you are the keeper of such a fish it can be pretty disheartening when it dies before its time. You begin to wonder what you did wrong, what you may have done differently and if you deserve to keep a fish at all.
I’ve been there, with bettas and other species of fish. All you can do it take an analytical view of your fish-keeping habits and try to puzzle out whether or not you made a key error somewhere along the line. In some cases you’ve done nothing wrong. Just like other pets, and even people, fish can suffer from congenital issues that shorten their lives.
However, any time you unexpectedly lose a fish it is worth your time to take a look at things and see if you might need to change some of your practices. This article can help with that process. Here I’ve outlined some of the typical reasons betta fish die, and what you can do to avoid them.
1. Poor Water Conditions
Dirty water is one of the quickest ways to doom any fish tank. And it doesn’t even have to be visibly dirty. Chemicals from decomposing fish waste and uneaten food can contaminate your tank, rendering the water toxic.
Betta have a reputation for surviving in harsh environments where most fish would perish. This is because they are anabantids. They have evolved the ability to take gulps of air from above the water when the water itself is polluted and low in oxygen.
Sadly, this is also what makes people think it is okay to keep bettas in bowls and tiny tanks. Sure, he’ll survive for a while. But small volumes of water pollute very quickly, and it won’t be long before he is feeling the negative effects of poor water conditions. Fin rot and other diseases may be the result, as well as a marked increase in stress that will shorten his life.
Here are three things you can do to avoid this situation:
- Choose at least a 5-gallon tank for your betta. This not only means a better living space for your fish, but the tank will be easier to maintain.
- Use a filter. Yes, betta fish need filters in their tanks. Some 5-gallon tanks come with filters. Otherwise, there are nano filters out there choose from. If you go with a 10-gallon you will have many more options.
- Vacuum the gravel and perform regular water changes. If you suck up the debris and perform a partial water change every-other week your betta’s home will stay much cleaner.
2. Low Temperatures
Some people seem to think bettas are like goldfish, and they’ll do fine in an unheated bowl or tank. This is incorrect. Goldfish require cooler water, but bettas are tropical fish. As such, they require water temperatures between 75 and 80 degrees.
Cool water again means stress, illness and premature death for your betta. Even if it’s warm where you live, if the temperature drops at night it will cause the tank water to rapidly cool.
So, what can you do?
- Choose at least a 5-gallon tank. (Yup, it's worth mentioning twice.) Tiny volumes of water cool off very quickly. Five-gallon tanks maintain their temperature a little better, and 10-gallon tanks better still.
- Use a heater. Like filters, there are nano versions available for 5-gallon tanks, but more options for 10-gallon tanks.
- Monitor the water temperature. Don’t rely on the heater settings. A simple aquarium thermometer will tell you how warm your water is at all times.
All fish need to eat a healthy diet. This means a good-quality flake or pellet and occasional treats. But some well-meaning betta owners go overboard, adding way too much food for one fish to consume.
Just like with people, when fish overeat it can lead to illness. Uneaten food can also foul the water, making it toxic for your fish. And, what goes into a fish must come out, so if you are stuffing your betta to the gills there is bound to be more waste in the tank.
So, what to do?
- Feed your fish once per day and only as much as he will eat in a few minutes. Try to make sure as little food is wasted as possible.
- Consider a fasting day. Skip feeding one day per week.
- Clean the gravel and perform water changes. Set a regular schedule to maintain a healthy tank. This doesn't have to be a major chore, and there are easy ways to do water changes.
4. Harassment by Tankmates
Betta fish can have tankmates in certain situations. However, you need to be very careful how you go about it. Certain types of fish may provoke aggression in bettas, particularly other anabantids or fish with flowing fins they may mistake for another male betta.
But there is another side to the story, one you don’t often think about until it’s too late. While bettas have a reputation for aggression and fighting, they are actually fairly small, slow-moving fish. They can be attacked and bullied by larger fish, and smaller fish may nip at their fins.
This means perpetual (you guessed it) stress which inevitably leads to a premature (say it with me) death.
So how do we avoid this?
- Have backup plan. Whenever you have your Betta in a community tank setting you need to have another setup ready to go in case of disaster. This could be something as simple as a temporary one-gallon bowl. (With the intent to upgrade him to a 5-gallon tank ASAP.) The point is to have a way to get Betta out of there if things go wrong.
- Never try to keep your betta fish with tankmates in a tank under 10 gallons. There simply isn’t enough room for everyone to get along.
- Be very selective about which tankmates you choose, and how you introduce your Betta. This article can help.
As we have seen, betta can die from poor water conditions, overfeeding, cool water temperatures and a dangerous living situation. Aside from the physical damage these issues can cause, when your fish is under constant stress he is more likely to get sick, and more likely to die.
But there are other potential stressors in you tank, ones you may never have thought of. The current from the filter or bubbler may push betta around. He may see his reflection in the tank glass and think it’s another fish, and constantly be looking to fight with himself. If he has no hiding spot such as a small cave or decoration he may feel vulnerable. If some knucklehead in your household is constantly tapping on the glass it may startle him.
There are a few simple things you can do here, aside from tackling the person who keeps tapping on the glass.
- Choose a low-flow filter that doesn’t blow him around the tank. Avoid bubblers in small tanks.
- Make sure he has somewhere to hide and escape from the world if he feels the need. Something as simple as a decoration or rock cave is fine.
- Adjust the light in the room so he doesn’t see himself. A little flaring is no big deal, but if he thinks he has to continuously defend himself it will wear him out.
6. Issues Beyond Your Control
Betta fish are bred in huge numbers. They live in teeny cups for part of their lives, until you bring them home. If I’m saying a tank smaller than 5-gallons pollutes quickly, you can imagine how bad those little cups must be. It seems the deck is stacked against these poor fish from birth.
You have no way of knowing if your fish is sick when you bring him home. You have no way of knowing if he has some congenital issue that he’s going to die from no matter what you do. You can take a new puppy to the vet to get him checked out for such issues, but with a tiny fish there is simply no way to know.
If you feel like you’ve done everything right and your fish dies anyway, you have to go easy on yourself. Yes, it always helps to take a look at your fish-keeping practices and analyze if you could have done something differently. But, remember, it may not be your fault at all.
Likewise, if you’ve done all the wrong things and your betta lived for years and years, don’t assume doing the right thing doesn’t matter. Like people, some fish can live unhealthy lives and survive into old age. And, some can live in healthy, heated, safe, happy water and die young anyway.
All we can do is what we can do. The rest is luck.
Caring for a fish properly can go a long way toward making sure he lives a long and happy life. As their stewards we owe it to them to try our best and keep their interests in mind. We have a responsibility when we take a living thing into our home and care for it. If we aren’t going to take it seriously, why even have a fish at all?
Aside from practicing smart aquarium care habits, one other thing you can do is be wise where you purchase your fish. Conscientious pet stores only stock as many fish as they know they can sell in a reasonable amount of time. If you see a massive pile of betta cups filled with dazed and half-dead fish, don’t bother looking for the one healthy fish in the pile. Go somewhere else.
If you’ve lost a betta it can be frustrating and heartbreaking. You may have made some errors, things you can do differently next time. Being a good betta owner doesn’t mean you are always perfect, but it does mean you do your best, and learn from your mistakes.
Questions & Answers
- Helpful 6
Can there ever be too many decorations in a betta tank?
Yes, it is certainly possible to overdo it. When decorating your tank try to strike a balance between choosing items that look good to you, and those that meet the needs of your fish.
Your betta needs room to swim around, and he needs clear access to the water surface. Consider including plants, live or artificial, as bettas sometimes will rest on their leaves. Provide a cave or decoration for shelter in case your betta decides he needs a secure place to hide.
Remember that every decoration takes away some tank space. If you include too many, your betta may feel stressed and crowded, just as if he were in a tank that was too small. A tank that’s overcrowded with decorations will also be harder to clean and allow more places for waste to get trapped.Helpful 8
What if I accidentally changed all my betta fish's water instead of 50%?
If you’ve made an error and changed all of the water in your tank instead of doing a partial water change it’s not the end of the world. There are a few things you can do to help yourself and your fish.
The problem with complete water changes is you are potentially killing off many of the helpful microbes that live in your tank. You are also stressing your fish, who had become accustomed to the water he’d been living in.
Water parameters will swing widely after a full water change, and that’s not good for your betta. A partial water change ensures your microbe colonies stay intact and that your betta doesn’t suffer unnecessarily stress.
Your tank will eventually come back to normal, and hopefully your betta has not been harmed. The concern is for the water quality while this is happening. In a properly functioning (cycled) tank there is equilibrium between the waste your betta makes and the microbes that handle that waste. By performing a full water change you’ve potentially sent that process into disarray.
As a result, waste chemicals may rise to levels that can harm your fish. The only way to know for sure if this is happening is to test your water and get readings for ammonia, nitrite and nitrate. You want your ammonia and nitrite at zero, and your nitrate under 20 or 30 ppm (some fish keepers are fine with nitrates as high as 50).
Test every day, and if you are seeing higher numbers change a small amount of the water (~20%) without bothering the filter or substrate. The idea is to dilute those waste chemicals until your tank cycles back around.
Hopefully your tests will show you’ve not done much damage and things will come back to normal fairly quickly. Then, stick with partial water changes.Helpful 4
Are betta fish good tankmates for mollies?
As with any potential betta tankmate, the answer is a definite maybe. Betta can be great community fish under certain circumstances. The problem is you can never really know how your betta will get along with any other fish until they are put together.
However, mollies certainly would not be among my top choices for tankmates. Mollies are active fish that may provoke aggression in bettas. Varieties such as sailfins and lyretails may be similar enough to your betta in appearance that he mistakes them for another male betta. There is also the chance that a molly would pick on the betta and nip at his fins.
Of course, there is the possibility that they will get along fine, too. Some bettas are more aggressive, where others are more docile. I’ve had mollies that were the terrors of the tank, and others that were peaceful. You just never know.
I would consider other options, but if you do decide to keep your betta with mollies, or any fish as a tankmate, make sure you have a backup plan in case things go wrong. You’ll also want to make sure you have a large enough tank, ideally bigger than ten gallons.Helpful 4
Why do betta fish get dropsy?
Dropsy in betta fish is typically caused by overfeeding, feeding inappropriate foods, and poor tank conditions. Dropsy is not a disease in itself, but a symptom of a bacterial infection and the resulting kidney problems. Because the kidneys are not operating correctly, the fish will retain water, and we see the bloating and pinecone-like scales we associate with dropsy.
While any fish can potentially become infected, stress caused by the aforementioned overfeeding and poor water conditions can make a fish more susceptible. Strong, healthy fish have immune systems that can better deal with infections, where fish weakened by poor diets and bad water will fall ill.
Therefore, the most important things in avoiding dropsy for your betta fish are to avoid overfeeding and to keep the water clean. These two steps, if done properly, can help you avoid many diseases and conditions that lead to a premature death for aquarium fish. This means following a proper feeding schedule – perhaps including a fasting day week – and performing regular tank maintenance such as changing the water and vacuuming the gravel.
If your betta fish does show signs of dropsy, the outlook is not good. However, there are some actions you can take if symptoms are recent and relatively mild, such as performing a water change and administering an antibiotic. If your betta lives with other fish you may wish to quarantine him, as the same issue that led to his illness may make them sick as well.
Finally, if you do lose a fish to dropsy and are convinced you did nothing wrong, remember that, just like people, some fish are naturally weaker and more prone to getting sick. It may have been simple bad luck, and no fault of your own.Helpful 2