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I haven't had a fish for ten years and two days ago an anonymous person gave me one.

  • Right now he doesn't move much and doesn't eat.
  • He is in a smaller fish bowl and doesn't come up unless he is moved.
  • Occasionally when I come in he is at the surface then sinks back down to the bottom.

I am worried he is sick and I don't know what to do!

  • If you are worried that he is ill, consult a veterinarian. Also, does he have the same water that he came from? Some fish get ill from being placed in completely fresh water. – Vixen Populi May 10 '15 at 8:21
  • Possibly related pets.stackexchange.com/q/5865/207 - read also answers – Voitcus Jul 10 '15 at 10:03
  • Does he have Swim Bladder Disease, maybe? This is where the fish has trouble swimming, sinking, and tends to float on his side. – rlb.usa Jul 10 '15 at 21:10
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If it's a small bowl, bring the entire setup to your local aquarium or pet shop. They will test your water and tell you if you have a water chemistry problems. They'll also be able to tell you how to care for the fish on an on-going basis. If it turns out there is something physically wrong with the fish, they'll also be able to advise you about possible treatments or if a vet visit is warranted.

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  • Downvoted accidentally and cannot change my vote, sorry about that, was an accident. – rlb.usa Jul 10 '15 at 21:07
  • But testing the Ph, ammonia levels, etc is a great idea – rlb.usa Jul 10 '15 at 21:09
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The most likely cause is stagnant and polluted water. Beta fish are billed as being able to live in these small setups because they are able to gulp fresh air.

However fish, like any other living being, produce wastes and in such a small environment they build up to toxic levels quickly. A lot of people think it's okay to keep them in the small bowls, mostly because pet stores have made it public opinion that it's the best setup for them. You'll see them in the itty bitty plastic cups and think that the 2.5cup container with the pretty rocks is an upgrade.

The best thing you could do for this fish, for the least money, is to run to Walmart, amazon, or another pet store and buy a 5gal hex with a build in filter and light. I do know Walmart had a 2.5gal with a filter and light. It might work well, but I did a cursory search and a tank like this is just under $40. Barring it being too sick already, I'll guarantee that your new fish will be up and swimming in the return stream fairly quickly. It'll put on color and be much flashier. It'll start eating again as well.

The filter will filter out the wastes and it won't sit there coated in them anymore, the filter return will provide stimulation and make it swim more, which helps it put on muscle and encourages it to show it's fins. Keep in mind while doing this upgrade, that the tank needs to cycle. You can find lots of info on that online. Taking a little water from it's tank or a pet store tank will greatly reduce the wait time on this. You need to let healthy bacteria establish to help break down the fish waste. I'd immediately change half of the fish's current water and feed him a very small amount till he gets in the new tank. Good luck.

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