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Animal-World info on Red Eye Tetra
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monsieur - 2010-09-10
Lemon tetras and red eye tetras are great hardy tetras for beginners, they look some what alike.

Animal-World info on Congo Tetra
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Mike - 2010-02-27
Beautiful fish. I have 7 in a 30 gallon in addition to some other fish.

Someone here said they reach a max of 5 inches, but everything everywhere I've read said that males get to 3.5 inches, and females stay closer to 2.5 inches.

they seem to get along well in a community tank.

Plus, you have the joy of having very rare tetras which 90% of other people don't have.

I take pride in having rare fish. And the Congo's fit right in with my African Butterfly, Leopard Ctenopoma, Female Krib, and cories.

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  • cheryl - 2010-09-04
    I have some of these & am going to expand the school as a larger fish in the tank died. They are beautiful & mine are not timid at all. I have the ones that look more olive green/electric blue & I am having a hard time finding more of those. Mine are getting along nicely with African Red Eyed Tetras (another less known, awesome fish! - not to be confused with Red Eye Tetras) a Giant Danio that has a blue-green sheen to him, a large killifish (that I believe was mislabeled as a gardneri) & a couple of peppered cory cats. I have a blue-green iridescent thing going on somehow... I have a Leopard Ctenopoma that i would be afraid to put with these because he is (& so has every other one I've owned) a little on the aggressive side. They like to chase other fish, especially when the lights are out. They are one of my favorite fish.
Animal-World info on Black Pacu
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dont trip - 2009-07-16
My auntie has 2 pacus, 1 is about 1ft and sum inches and da other is about 5 or 6 inches. The bigger pacu has its on tank because it killed the oscar and the other fishes. The small one is in a tank with a black shark, both tanks are about 75 to a hundred gallons, between those two numbers. The big pacu will not allow any other fish to be in his tank and if you were to put another fish in there it wuld kill it, even if it was its own kind.

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  • Jeff Rapps - 2010-08-31
    Is your auntie's gentle giant still in the 75g tank? Poor poor fellow :(

    These fish should be sold to the general hobbyist.
Animal-World info on Red Eye Tetra
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Phil - 2010-08-26
These fish are the most beautiful fish in my tank. They stay in a school and no one tries to attack them they are peaceful with cherry barbs, moonlight gouramis, and red blue gouramis.

Animal-World info on Rummy-nose Tetra
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steve - 2010-08-24
I have 6 rummy nose tetras in my community tank. They are amazing to watch and are my favorite tropical fish by far! They proved to be easier to care for than I thought! They swim with almost every fish in the tank, and they bring great color to any aquarium!

Animal-World info on Common Hatchetfish
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Anonymous - 2010-03-05
Hatchetfish's scientific name is argyropecus gigas.

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  • Editor's Note - 2010-03-06
    Thanks for the information. There is fish with the common name 'hatchetfish' and a scientific name of 'Argyropecus gigas but it is not the fish listed here. To see the difference, you can see a picture of it at Hatchet Fish
  • Editor's Note - 2010-03-06
    There are a number of different hatchetfish. Different species can be found in both freshwater and in the oceans. Argyropelecus gigas is known as the Greater Silver Hatchetfish. It is a marine hatchetfish of the genus Argyropelecus. It is also called the Giant Hatchetfish or Large Hatchetfish. It was described by Norman in 1930. The one seen here is a freshwater hatchetfish known as the Common Hatchetfish or Silver Hatchet Fish, Gasteropelecus sternicla.
  • Anonymous - 2010-03-26
    Why are they called that?
  • Anonymous - 2010-08-09
    That's the binomial name for the marine species. The South American freshwater species are different altogether.
Animal-World info on Buenos Aires Tetra
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Kyle - 2010-08-07
I have ten of these guys in my 29 gallon cichlid growout.. it USED to be a wonderfully planted aquarium when I had 3 but as soon as I upgraded the group they tore every single plant to shreds including anubias and java moss! They are very aggressive eaters so do not keep with finicky feeding community fish. All around though they are very entertaining and energetic tetras with lots of personality! I highly suggest you try a group out!

Animal-World info on Silver Dollar Fish
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Wendy - 2008-12-22
I need some advice. I have had my Silver Dollar for a long time. I never had this problem until recently. The fish has slowly lost his tail and the rot is eating into the other fins. There is no evidence of any coloring or fuzziness on the fin edges. I have tried Metaplex but am leary of antibiotics since they usually totally mess the water up. I am going to get rid of three Goldfish in the tank (they don't nip) because I think they may be contributing to a high ammonia level. Any ideas on what to use for the Silver Dollar, since they have sensitive skin? You can email:

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  • bettaboy - 2010-05-11
    Your problem is that you have goldfish (cooler water, different metabolism, completely different requirements re water chemistry et al) with your Silver Dollar.

    Bacteria is there and when it is "evident" is in usually fatal stages - just as with people it lurks...

    They do not have sensitive "skin" you have poor water quality - wrong combination of fish - please - the information can not be provided here (degrees and decades of experience) do some homework.

    NO Ammonia, balance your water with partial smaller twice weekly changes - place the goldfish (20 gallons per INCH) with extra filtration so on... into another aquarium... and start over AFTER you do some reading up (library or other reliable sources not mouth to mouth info from web).

  • john m - 2010-05-28
    Treat the h20 w/ eriromiacin.
  • Danielle - 2010-07-30
    I have 3 medium Silver Dollar fish in a 120 gallon tank. The smallest one had tail rot last year in which he rapidly lost his entire tail! At first I used Melafix and Pimafix for one to two weeks to control the rot, then I realized that the water quality was failing without the carbon and I decided to stop the treatment and do frequent 40 to 50 percent water changes every three days. Having improved my water quality: No ammonia, nitrite, and low nitrate level under 20, this really allowed the tail to completely grow back in one month. It has been a year now and his tail is thin but clear and back to normal. I really thought he was going to die, but with frequent water changes and affective medication, he survived.
Animal-World info on Serpae Tetra
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Shamika Daughtry - 2009-10-08
Hello, I always wanted a fish tank. So one day I went and bought me a 29 gallon tank. I had swordtails, tetras, mollies, and platies. Well I was having some bad luck with my tank, my swordtails lived for about a month and died. So I went and got more that were pregnant but a week later they died. So now for the tetras, I had about four, three died three weeks later. So on 10-7-09 I bougout four more tetras. I also have gold zebras, danios zebras. Well I'm just going to wait and see what's going to happen.

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  • andrea - 2010-02-27
    You either have new tank syndrome (bad water quality) or you have a bad fish store you are buying from.
  • RW - 2010-07-28
    For best results with first time tank bought, start by buying the tank and accessories only. Treat the water with neutralizer to remove chlorine which kills fishes. Wash the substrate well in a small basin with running water for at least 3 rinses. Set up your tank and run the filters for at least 3 days w/o any fishes. Introduce the fishes starting with surface or mid water fishes. Add the bottom dwellers last about at least a week since they are susceptible to ingest poisons that may sit on the substrate.

    If you are using tap water. Keep at least gallons of it (enough to do a 50% water change) stored at all times pre-treated with neutralizer and only use it at least 2 days after they sit in storage. You may disturb the stored water during storage to release chlorine bubbles depositing on the sides of the container. For best water quality, you may use R.O. though expensive.
Andrea - 2010-05-01
Hi, my name is andrea, I have 13 fish in all in my 35 gallon tank. I got 3 guppies, 2 mickeymouse, 1 color tetra, 1 black moor, 1cat fish, 1 algae, 2 glo-lite,and 2 serpae tetra. One of my serpae is picking on my black moor, poor thing, I had no problem, with the fish till I got the one serpae, think it's a male. He got all the fish scared, what can I do? I also have a 10 gallon tank set up for baby guppies, and baby platys. Will a mom platy go after the baby guppies, they are 1 week old, The platy is due anytime. Thanks, Andrea

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  • Penny - 2010-05-11
    Live bearers WILL eat the fry. I was successful breeding platys and guppies only because I removed the mother after dropping the babies. She did eat a few before I got her out. The babies ALL survived. Did not lose any.
    If you want babies, remove the adults!
    I put the mother back in the community tank.
  • RW - 2010-07-28
    Any goldfish species generally attract nippers. Based on experience a goldfish should not be mixed up most of the tetras and barbs since goldfishes are slow and lethargic while tetras and barbs are very active. Some none aggressive barbs and tetras may pester a goldfish by making them as an itch object. They would glide swiftly and brush their sides or bellies on the head or any body parts of goldfishes.

    It is either you keep goldfishes which mixes well with koi, live bearers or you have the tetras and babs with some cichlids.

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