Q&A for How to Care for Piranhas

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  • Question
    How many piranhas can I put in a 5 gallon tank?
    Community Answer
    None, that would be like having your entire home be a broom closet. It's best to get at least a 30+ gallon tank for one.
  • Question
    Can they live in a ten or twenty gallon tank?
    Benjamin Y. Jackson
    Community Answer
    When finding a habitat for piranhas, bigger is always better.
  • Question
    Where can I buy piranhas?
    Daniel Hu
    Community Answer
    Check your local petstore. Some places have laws that make it illegal to keep piranhas, so be careful and check the local laws before purchasing one.
  • Question
    Will it cost more if you have more piranhas? What gallon tank would I need for one piranha?
    Community Answer
    Yes it will. More fish means a bigger tank and more food. For a single piranha, you want, at the very least, a 25-gallon tank, but 30+ gallons would be advisable.
  • Question
    Can I put in live food for the piranhas to hunt for themselves?
    Community Answer
    Guppies and minnows can be served live no problem, but for sardines and larger fish, it's best to cut them up with scissors before feeding them to your piranha.
  • Question
    Can the piranha bite you when you clean their tank? Isn't it risky to keep them?
    Community Answer
    If you are careful and fast, the little creature will not bite you. My piranhas are actually very well behaved. If they get to know you, you should be fine.
  • Question
    Do I need a heater?
    Community Answer
    It depends. If you live in a cold area, get a heater. If the area you live in is warm most of the year, a heater might not be needed.
  • Question
    Do piranhas eat small fish, like guppies?
    Community Answer
    Piranhas will eat guppies, specially when the guppies you feed them are alive.
  • Question
    Can I have algae eaters with piranhas?
    Community Answer
    If the algae eater is provided with plenty of space and hiding areas, then it should be okay, but this is a risky move.
  • Question
    What are the benefits of keeping more than one piranha? Does it make them happier?
    Community Answer
    Piranhas are naturally schooling fish, so they would feel more comfortable in a group of 3 or 4, but it would be fine to have a loner. if you have a 20 to 25 gallon, only get one.
  • Question
    I just bought 3 very small Piranhas. Is flake food suitable for them at this stage?
    Community Answer
    You can give them flake food when they're still small, but live food is ideal.
  • Question
    Can a piranha eat hair?
    Community Answer
    No. Hair is an inedible object for piranha to eat. Piranhas would prefer to eat other fish in the wild, but you can feed them frozen or freeze-dried food.
  • Question
    How can I feed them mutton?
    Macaws r me
    Community Answer
    Since Piranhas eat flesh and meat you can feed them small, raw pieces, but in order to do that here are the steps 1. Purchase meat. 2. Wash meat thoroughly with water. 3. Tear, rip, or cut into small chunks. 4. Use large feeding tongs found at pet stores. 5. Grab meat with tongs and put in water. 6. Watch your Piranhas tearing at the meat!
  • Question
    What size aquarium will I need to house 50 small piranhas?
    Community Answer
    It would need to be huge; though your piranhas are small now, they grow pretty fast and will soon be 6 - 8". At the recommended 20 gallons per piranha, you're looking at a 1,000-gallon tank.
  • Question
    If I have nine piranhas, how big of a tank do I need?
    Community Answer
    I'd say a 110-130 gallon tank in the long run. MAYBE a 90 gallon at minimum. Just remember these fish can become very large in adulthood, and are very active.
  • Question
    How man gallons of water will I need for 300 or 500 red-bellied piranhas?
    Questions123456
    Community Answer
    If you go by the 20 gallons per piranha - which is best - you would need a 6,000 gallon tank for 300 red-bellied piranhas and a 10,000 gallon tank for 500.
  • Question
    So a 40 gallon tank would be okay for 4 piranhas?
    Questions123456
    Community Answer
    No. 60 Gallons for 4 piranhas is best. It states in the "Setting Up A Tank" section: "As a rule of thumb, you want about 20 gallons of water per animal or 60 gallons for 4 piranhas."
  • Question
    What other fish can be kept with piranhas?
    Community Answer
    Anything very large in size should work: big catfish or pleco, pacu, or maybe even an oscar or two.
  • Question
    What other fish can I put in the tank with the piranhas to eat the scraps of fish floating around in the tank once the piranhas are done eating, in order to keep the water clean and clear?
    Community Answer
    I have only kept a single pleco in my piranha tanks. They aren't know to eat much, so netting the scraps out and/or feeding less is probably your best bet. Some people have pacus (close cousins) in the tank, as well as large Oscars, and they live well together given you have a larger tank and some good hiding spots.
  • Question
    What should I do if my piranha only eats pieces of fish?
    Community Answer
    Just like humans, animals have preferred foods too! Your piranha probably just prefers meat, but if you really want him to eat different things, just sneak a little bit into his dinner. As time progresses, slowly introduce more of it into his dinner until he gets used to eating it.
  • Question
    How would I feed them a potato?
    Community Answer
    Piranhas won't eat potatoes.
  • Question
    Would I be able to fit about 6 piranhas in a 60 gallon tank? I know it should be about 20 gallons per fish, but does that change as the number increases?
    Community Answer
    I would recommend only 4 fish in a 60 gallon tank. They need enough space to hide from the others if needed. There's a pecking order between them, and one may get picked on more, hence the need for hiding space.
  • Question
    Can red belly and black piranhas live together?
    Community Answer
    No, they cannot. This is because they will fight each other; the black piranha is a much bigger and solitary animal that likes its space and guards its territory.
  • Question
    Can a piranha live happily in a 40 gallon hexagon tank?
    Community Answer
    Yes, if the length is a little more than 13 inches or 1 foot and 1 inch because the fish always stay on a straight side.
  • Question
    Is it okay to keep just one red belly piranha?
    Community Answer
    Since piranhas are schooling fish, they are usually comfortable in groups in at least 3 or more, but a loner can survive by itself.
  • Question
    What size tank do I need for piranhas? What's the ratio?
    Community Answer
    The proper tank size is 25 gallons per piranha and you can keep 4 piranhas in a 60 gallon tank. Do not keep your piranhas in anything that is too small for them. That can cause countless issues with your fish.
  • Question
    Does a red-bellied piranha need oxygen?
    Community Answer
    Yes, all fish need the water to be oxygenated.
  • Question
    How many piranhas can fit in a fish tank?
    Community Answer
    Depending on your fish tank's size, for one it would be 20 - 25 gallons minimum. For a tiny school of 4 it would be 60 gallons +.
  • Question
    Can I feed piranhas lobster or goldfish?
    Community Answer
    You should not feed piranhas goldfish as they can give them certain diseases. You might be able to feed piranhas lobster as you can feed them crayfish but double check before you do so. This is assuming the lobster is dead as lobsters are saltwater animals and cannot survive in freshwater.
  • Question
    Can I feed chicken to my very big Piranha fish and how many times per day do I feed it?
    Community Answer
    You should feed your piranha once a day. You can chop up the chicken and give a bit to your piranha each day. Don't feed a whole chicken, that's too much work and mess for your fish and you to deal with.
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