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Common Signs of Stress in Betta Fish


Full glory 2, originally uploaded by littlerottenrobin.

Q: G wrote,

I found your web site to be most informative and that is why I am contacting you.

Attached please find a picture of sparky, my 8 year old helped to name it.

Here is the set up that I have in place right now. It is a 2 gallon hex tank and I populated it with plastic plants and a couple of caves which he likes. I have an under the gravel filtration system and a good layer of gravel to ensure good filtering.

I use aqua plus and cycle in the water and I am changing it once a week. He seems happy, but could you please explain what signs of stress would be as I am not sure what to look for. As I said he seems happy and comfortable. I put a bent straw sealed at both ends, (no chemicals used) to create a boom on the surface of the tank to deflect air bubbles coming from the filter so he could have a clear space to come up and breath and to eat food. Seems to work quite well.

Another question is how can you tell if the current is effecting him and if he is struggling? Seems ok but you never know.

Food wise I am using freeze dried blood worms. Is there any other type of food that I should be supplementing him with? I do not have a heater for this small tank as the store where I purchased it did not have a small heater for the tank. Is there anything available on line? Is there alternatives?

I know that Betta’s do better in bigger tanks but this was a compromise that allowed me to purchase the little guy. I am happy to provide him a home as the store where I bought him kept him in a small cup with water in it that was only half full, they said it was natural for the Betta. I would like to let everyone know that the total set up cost of this tank and for the little guy was around $100.00, but the continuing cost look to be low and requiring more TLC then money. Spend a little bit of money for your fish to make his life better.

A: Hello and thanks for writing in and showing a photo of Sparky, who is just adorable. I’d be happy to go over some common signs of stress but first I will start with good signs of a healthy Betta.

Signs of Good Health

– Bright coloration
– Swimming actively and easily
– Flaring
– Building a bubble nest
– Strong appetite
– Greeting human at the glass
– Full finnage
– Good body shape (no bumps, bloating, missing scales)
– Smooth, clean gills
– Dark and clear eyes

Signs of Poor Health

– Dull coloration or gray color
– Sluggishness or Lethargy
– Loss of appetite, disinterest in food
– Uninterested in surroundings
– Clamped finnage, torn, shredded or missing fins
– Bloating, weight loss, bumps, missing scales, open wounds, red streaks
– Red or swollen gills
– Cloudy, protruding or sunken eyes

Of course, this isn’t a complete list but it covers the basics. I should also mention that any one little thing isn’t a cause for panic. For instance, if your betta won’t build a bubble nest, this doesn’t necessarily mean he’s stressed. More than any one particular signal, you really want to observe for drastic changes in

behavior. For instance, If your betta actively approaches the surface at feeding time, has bright coloration and frequently explores his tank and then you suddenly notice he has no interest in food, appears pale and hides in the back, then you might want to start looking for stressors.

As for current, a struggling betta is fairly obvious. Since they aren’t strong swimmers a strong current will literally push him aside. In a large enough tank this isn’t generally a big deal because he can swim in areas where the current is less and venture into the current when he wants. If the current is overcoming the entire tank then he wont be able to swim much at all and will be forced to cower or take shelter. If he is able to explore his tank, then the current is probably fine.

To answer your question about freeze-dried blood worms, I think they are an excellent food for bettas but I do recommend offering a variety of other foods as well. Just blood worms alone are not a complete and balanced diet. You could supplement his diet with betta pellets or a variety of other foods like brine shrimp, mysis shrimp, beef heart, daphnia, live black worms or live white worms among other things. To learn more about feeding bettas and the types of foods available visit Nippyfish Feeding

There are also several

heaters available for smaller betta tanks. I recommend a small 7 watt heater for a 2 gallon tank. I really like Drs. Foster & Smith for aquarium supplies.

Thanks for your idea of using the straw as a boom. That’s really inexpensive and easy way to cut the current and I think it will really help our readers. I hope I answered all your questions and good luck with Sparky!

Actual photo of Sparky by the original emailer.
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Maddy: Christie F is a Betta splendens hobbyist that enjoys spending time caring for her fish and helping new betta keepers learn the ropes.

View Comments (35)

  • I really like the straw idea. I found somewhere else how to make a baffle for my filter using an old plastic soda bottle. Anything to cut the current!

  • That’s a neat idea Tracey. I have also heard of using one of those plastic soap dishes with the suction cups in front of the filter outlet. Though, a brand new one of course, not one that has had soap in it.

  • my betta started out with popeye…but always had red streeks in his tail….i didnt know it was a problem…
    now his popeye has reduced a little…but still bigger…i used marcyn 2 but..know his eye is red and tail is getting more red as well as his eye!
    I took this fish from a person who was going to flush time …so I am trying to same him! and I need help…
    Now I am using aquirsol..becouse he has white little worms on him…LORD HELP this fishie
    yolandramartin@gmail.com

  • That was a good idea for the straw that will help alot because im getting a betta after i move so i want him to live 4 a long time thanks christie

  • Anonymous with the poor, poor fishie–
    Go to Bettatalk.com. Buy the "Betta First Aid Kit". My betta started out with fin rot and the first aid kit was totally worth it. If it weren't for Bettatalk.com, my poor little fishie would've been down the toilet!
    PS Maracyn sucks, i would know :P

  • I was looking for the signs of stress in bettas and I am glad to have found it! Just wanted to say thanks and that I have a healthy lil friend. I have my tank at 80 and a very small filter set on low on one side of a 5 gallon tank. He’s always flaring and he eats well. Most betta I see are not lively at all so I was worried for a bit. Now I can rest and not worry. Thanks

  • By the way…in my joy of having a happy Xerxes, I forgot to tell you that your betta is absolutely STUNNING!

  • reading your guys comments help out a lot. I’m trying to learn more about Betta’s and how to take care of them. is getting a heater for a one gallon tank a good idea?

  • i have a one gallon tank with an internal filter and i have a veil tail male betta. so far ive not needed to get a heater because i keep him in the home office on my desk where its warmer and that room is close to the furnace so it stays warm and his water temp stays around 75 degrees all the time…

  • we ran out of food for a day and had to wait til the next day to buy some more, and the store was closed so we waited longer. our poor betta Jasmine was being poked and chased by our betta ariel. Once the food has been fed to them ariel still picked on jasmine and and jasmine is constantly hiding in their ship and flower log. I was going to remover her today and now she is missing? HOW DOES THAT HAPPEN? did ariel eat Jasmine?