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Kokos Goldfish Forum


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  1. I have a few dozen such fish, and have spent a lot of time trying to dispose of this widespread misinformation. Unfortunately many people repeat whatever they read on the internet so you can read this everywhere. If you ask the person who said this how many commons/comets/shubunkin they own, you can determine whether they have qualifications for making this statement. Long bodied goldfish lived as pets for a long time before fancies became available. In domestic situations, they do not get larger than fancies. They get longer, but fancies get both wider and taller. Mature goldfish of all varieties have similar mass/volume. We recommend 20 gallons per goldfish for all varieties, basing that on experience, not internet rumor. We probably should recommend larger volume for fancies, since these more delicate fish need better water quality, but 20 gallons works for all but truly giant goldfish. I keep two pond-sized mature comets/commons/shubunkin in 40 gallons where they appear perfectly happy. You will read that long-bodied goldfish need more space because they swim so fast. They do dart around as babies, but fish biologists call goldfish sedentary fish. As adults, they rarely swim fast unless terrified, coming for food, or spawning. The rest of the time they meander around looking for something to nibble on. I recommend the 40B for two fish because most people here keep fancies, and when these get large they have little flexibility and may have trouble turning in a narrow tank. A mature comet can turn around in a 6" wide tank. I can tell you some differences between fancy and long-bodied goldfish, since I have both. The fish with long bodies live roughly three times as long as the fancies. They very rarely experience the incurable swim bladder disorders which occur frequently in aquarium-raised fancies (but no so often in pond fancies). The fancies have lost some of the protective instincts of prey fish, since they have never lived in the wild. For example, all of my fish respond to those they know with open mouths, but the fancies do the same with strangers. (Fancies that live with long-bodied fish hide like their "wiser" buddies when a stranger appears.) While fancies seem to benefit more from moving from an aquarium to an appropriate pond, they need a predator-proof pond cover even more than the long-bodied fish. Wow, that's so good to know! Thanks a lot! I learned in biology class that "fancy" goldfish, because they are so far from their ancestor's form, suffer different issues (some of which you bring up). I've heard around the boards that comets/commons tend to be healthier because their bodies are more similar to their ancestors. I've heard people use the word "hardy", saying they're more hardy than those fish who look very different than their ancestors (such as the goldfish with the goofy cheeks - who thought that was a good idea? I imagine those can be punctured?)
  2. Hi, all, I've done some more research (this is so fun!) Since comets and other similar looking goldfish grow so large and are so athletic, I've decided considering my space constraints and the fact that even a 40g wouldn't be enough for swimming and waste dilution, I am going to look into fancy goldfish in stead. I'd appreciate any suggestions when it comes to types, though I'm limited to what my local pet stores have. I LOVE the idea of "saving" a couple of "feeder fish", but I may need to go for the goldfish meant to be kept as pets. I'm not complaining! (I will have a small army of comets when I have my own home - mwahaha!)
  3. Thank you! I am hoping, if I go through with this after careful consideration, to purchase and set up everything for the 10 gallon tank. Then I'll work on getting things together for a 40g tank, and hopefully it will be cycled through and ready when I move the fish. I also go home for Christmas, so I am hoping to have it ready when I bring my finned friends home for the holidays!
  4. Hello, all. I am excited to be part of this forum! I've been aware of this community's online presence for several years. I nearly made a very bad purchase that would've hurt whatever fish I was trying to take care of, but thankfully I decided to do my research first. I have kept fish for most of my life. My parents didn't understand the fish keeping hobby - they stocked a very small tank (maybe 3-5 gallons?) with fish, not paying attention to how they might do. When I tell my mother many fish can live up to a decade or more if taken care of in pristine conditions, she doesn't believe me! We once had a goldfish I named Monster Fish. He (we never sexed him, but used male pronouns) began as a five cent "feeder fish". He was a comet goldfish, I've come to learn. He had a white body with an orange spot on the top of his head. That fish lived for something like 4 years, in various tanks I had growing up. He got so big - around 6.5 inches long - I've learned he could've grown even larger! It got to the point where if we put some very small fish in with him, he would eat them. I loved that fish so much - if I put my hand in the tank, he would swim up to it and give my fingers a "kiss", or rub against my hand. Loved that fish. I am now in a small apartment, and we're allowed a 10 gallon aquarium. I am considering populating it with a betta fish and a snail, perhaps a shrimp or two. Or other fish that would thrive for their entire lives in such a small tank. However, I would really love to pick up goldfish keeping again. Here is my situation - I will be living in this apartment for another 6 months at the most (possibly only 3), before I move back home and begin graduate school (I'm learning to be a Social Worker!) I have my mother's permission to purchase, setup, and maintain a 30-40 gallon tank. I am educated in the nitrogen cycle, and would regularly test and cycle out the water. I would give these fishies the best care possible. I am considering two goldfish, since I know companionship is important. I'm thinking of comets since I had such luck with them, and I think they're beautiful. I will purchase them from Fry or Parr from my local pet store, and so I'm hoping that in the 3-6 months they're in the 10 gallon, they'll fair well, and by the time I transfer them to a 30-40 gallon, they'll be ready. How does this sound? I hope I don't sound too naive, I am interested in taking up this hobby and understand the responsibility of a living being depending upon me for everything - I must give it/them the best care possible. While I'm posting, I must complain. The Colorado State Fair is going on, and many friends are coming home with goldfish in small plastic "tanks" that can't be more than 3/4 gallon at best. I told one friend "congratulations, you'll want at least a 10 gallon tank with a filtration system and something to oxygenate the water for your new friend!" She responded, "I don't have money for that, it will be fine." It's like people don't realize how amazing these fish are when they thrive for their entire lives, and what a devastation it is when they're mishandled, which happens all too often.
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