How Long Can Betta Fish Go Without Food?

How Long Can Betta Fish Go Without Food? Many people don’t realize that betta fish, like any other living creature, need food and water in order to survive. One common question is how long can a betta fish go without food? First let’s look at why it’s important to understand this question. Many new fish owners buy an adorable betta and then promptly forget about the poor guy for days or even weeks at a time.

How Long Can Betta Fish Go Without Food?

In order to give your betta fish the best chance of survival, it is important that you take some factors into consideration. For example: As we’ve just mentioned bettas can survive between 10-14 days without food however there are still many things which need considering before leaving them unattended for such a long period time.

How Long Can Betta Fish Go Without Food Tank Size

One of the most important factors in how long betta can go without eating is the size of his tank. A small, poorly-sized betta fish tank cannot provide adequate space for your fish to swim around in, so he will become extremely bored and tired after just a few minutes. He may try to seek out an area where he can rest peacefully but if this isn’t available (and it often won’t be in a tiny bowl), then there’s nothing that can be done except wait till you get home to feed him.

Filtered vs Unfiltered Tank

Another critical factor when thinking about how long betta fish can go without food is whether or not the tank has any filtration system at all. New betta owners may not realize that bettas cannot live in a tank with no filtration, so if you have one of these tanks then your fish will die within just a few days, maybe even hours.

Betta Fish General Health

The health of your betta fish is another crucial component to how long he can go without food, but this factor does not depend on the size or type of tank at all. If your fish is sick or injured in any way then he will not be able to go for very long periods of time without eating because his body simply won’t have enough energy to function properly. These are just some general rules about how long betta fish can go without food, but it’s certainly possible that there are exceptions to this claim. For example, it is possible that a betta fish can go for weeks without eating as long as he has a big enough tank and is healthy enough to swim around in it like normal.

How Long Can Betta Fish Fry Go Without Food?

Wild Betta Fish Species Profile and Care

Another common question among new betta owners is how long betta fish fry (babies) can go without food. The answer to this question depends on several factors: the size of the tank, the number and type of other fish in the same tank, and whether or not your tank has any filtration system at all. Generally speaking though, mealworms or brine shrimp should be dropped into their once every week for about 10 minutes. After this feeding time is up, the food should be taken out and any uneaten bits of it should be removed from the tank.

What Do Betta Fish Eat?

What do betta fish eat? In general, betta fish can survive well on a diet of flakes or pellets that contain protein as their main ingredient. In fact, most veterinarians recommend that you not feed your betta too many live worms or bloodworms because these foods are high in fat and phosphorous which isn’t good for your fish’s health. However, there are some bettas who can only be motivated to eat if they see live food moving around in their tanks so if you have one of these guys then it’s okay to feed him worms once or twice a week.

How To Prepare A Betta Fish Tank Before Leaving It For A Few Days

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Before you go on a trip for a few days, it’s important to prepare your betta tank so that your fish will be able to survive while he is left alone. Most importantly, you should have plenty of oxygen going into the bottom of the tank because bettas cannot easily get enough oxygen from the surface of the water like other fish can. One solution is to add an airstone to ensure that there will be enough oxygen in the tank at all times. Also make sure that your heater won’t malfunction while you are away and adjust its temperature according to how cold or warm it gets where you are going.

Optimize Your Betta Tank’s Conditions

You can take a few other precautions to ensure that you betta tank will have all the right conditions possible while you are away for a few days so your fish doesn’t have to go without food at all:

Check Your Betta Fish Tank’s Heater

It is critical that your betta tank has a heater, but it is just as important that you check to make sure that it isn’t malfunctioning in any way. One of the most common malfunctions that occurs with betta fish tanks is that the heater starts to cool down one side of the tank more than another, and this lack of heat distribution can easily kill your fish if he isn’t eating.

Use Cooler Water Temperature to Your Advantage

Another way you can ensure your betta tank has the right temperature is to actually lower the temperature of its water so that it will match the temperature of where you are going while you are away for a few days. Keep in mind that if you choose this option then your fish should be able to get enough oxygen from the surface of the water because cooler temperatures usually mean less oxygen can dissolve into the water. Also, make sure that dropping the heat won’t make other conditions in your betta tank too risky for your fish’s health or comfort level before doing this.

Put Your Tank Lights on a Timer to Maintain a Diurnal Schedule


It is important to keep your betta fish on a diurnal schedule while you are away so that his sleeping and waking hours will be consistent with where you are going while you are gone. A good way to do this is to put your betta tank lights on a timer and set it for the same time every day so that he has some consistency in how much light he gets during the day while you’re gone.

Leave a Securely Fitted Lid on Your Betta Tank

To prevent your betta from jumping out of the tank or getting into any other dangerous situations while you’re away, be sure to fit the lid tightly onto your fish tank before leaving. Although bettas can jump very high, their airstone should make it hard for them to get out of the tank as long as its water level isn’t too high.

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Make Sure Your Betta Can Get Enough Oxygen

When you travel for a few days, it’s important to leave your betta with enough oxygen so he doesn’t die while you’re gone. Keep in mind that if your fish can’t easily get enough oxygen from the surface of the water then there is a great risk that he will suffocate even if you have an airstone going inside his tank. This is why bettas who need live food every day should only be fed worms or bloodworms once or twice a week because these foods are higher in fat and phosphorous which causes problems for their health when they eat them everyday.

Do a Quick Health Check-up Before You Leave

Before you head out the door for your trip, do a quick check to make sure that there isn’t anything around your betta tank that could fall into it and hurt or trap him while you’re gone. Also take some time to remove any uneaten food or waste so your fish doesn’t get sick from water contamination. Then double check all of the steps above to ensure everything is set up properly before you leave for your trip so your betta can remain happy and healthy.