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post #1 of 7 Old 10-19-2009, 10:46 PM Thread Starter
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New tank

So Im fairly new at this having fish thing. I bought a 10 gallon tank and I have three goldfish living in it wonderfully. I just went out and bought a 40gallon tank and it came with 7 black tetras? I think they are called that. Im wondering how many fish a 40 gallon tank can hold and if I put the goldfish and tetras together any ideas on what I can get in my 10 gallon tank. Thanks!
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post #2 of 7 Old 10-19-2009, 10:54 PM
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Tetras shouldn't be housed with goldfish IMO... and 10 gallons seems a bit small for 3 goldfish. Tetras are tropical fish and require a heater where goldfish like cooler water than tetras should be kept in. What kind of goldfish do you have? They might be better suited for the 40 gallon...

Number of fish that you can put in a 40 gallon varies depending on the type of fish. You could have 1 adult jack dempsey... or a pair of adult angels... or 30 very small community type fish (smaller tetras, live bearers, smaller bottom feeders, etc.).
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post #3 of 7 Old 10-19-2009, 11:03 PM Thread Starter
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I've read that 3 goldfish need about 30gallons which to me seems overkill my fish have been living in there for about 6 month now and my ammonia and nirate levels are good I do 20% water changes every few days and the water is clear.
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post #4 of 7 Old 10-19-2009, 11:26 PM
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You have to think long term. They are going to grow and then be to big for the 10 gallon, I have 4 cichlids in a 29 gallon but am on the hunt for a bigger tank for them so they can grow
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post #5 of 7 Old 10-20-2009, 12:17 AM Thread Starter
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Originally Posted by xrayjeeper83 View Post
You have to think long term. They are going to grow and then be to big for the 10 gallon, I have 4 cichlids in a 29 gallon but am on the hunt for a bigger tank for them so they can grow
Yeah Im thinking in the short term but I plan on always upgrading tanks as needed they are small now once they start growing I will look about getting a 55gallon.
I was thinking about putting all 11 fish together since they are in a 10 gallon now (I know its packed! but I have to clean the used tank) and they get along well. Maybe turning the 10gallon tank into a small community tank
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post #6 of 7 Old 10-20-2009, 03:11 AM
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You'll be surprised just how big goldfish get. An 8" oranda is something to think about. 12" is the average size for telescopes, ranchus, lionheads, orandas, ryukins and lionchus. Pond types such as comets, hibunas (common goldfish), shubunkins, watonais, wakins and jikins grow even bigger at 18 ".

Perhaps this slideshow of my 75g goldfish tank may be worth a thousand words and they say "a pen is mightier than the sword". There are only eight there. I have ten more (and they're in my other tanks and ponds) whose photos I need sorting out and then some more later on...

Click here.

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post #7 of 7 Old 10-20-2009, 08:18 AM Thread Starter
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Thanks for the reply Im not worried about the fish getting big at least the goldfish we have a community pond here that is maintained so once they get that big I will put them in there.
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Originally Posted by Lupin View Post
You'll be surprised just how big goldfish get. An 8" oranda is something to think about. 12" is the average size for telescopes, ranchus, lionheads, orandas, ryukins and lionchus. Pond types such as comets, hibunas (common goldfish), shubunkins, watonais, wakins and jikins grow even bigger at 18 ".

Perhaps this slideshow of my 75g goldfish tank may be worth a thousand words and they say "a pen is mightier than the sword". There are only eight there. I have ten more (and they're in my other tanks and ponds) whose photos I need sorting out and then some more later on...

Click here.
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