tank mates for my corys? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 9 Old 09-03-2011, 05:32 PM Thread Starter
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tank mates for my corys?

I just upgraded to a 20g tank from a 10g.

I have two bronze corys already but would really like more of some type of cory since they are might favorite type of fish. I know they should be in a minimum group of 3 but when I first started out I just bought the two and they have been doing great for a year. They are very social and buzz around the tank all the time.

So, should I add just one more bronze cory? I would really like to maybe add two of another cory if possible but I'm not sure if different species would be the best choice or cause problems for my current corys???
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post #2 of 9 Old 09-04-2011, 12:18 AM
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I would definitly add at least another bronze cory, if you are going to only do one type of cory species than I would bring the number of bronze corys up to 6. If you want to do two different species that make sure you have 3 of each species.
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post #3 of 9 Old 09-04-2011, 06:48 PM Thread Starter
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okay thanks.

Would it be possible to do 3 bronze corys and a rainbow shark? Or will the shark behave aggressively towards the corys?
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post #4 of 9 Old 09-04-2011, 06:54 PM
Rainbow shark is too large for your tank. Also yes it is likely to be aggresive to other bottom feeders.
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post #5 of 9 Old 09-04-2011, 07:00 PM Thread Starter
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Ooh okay! Thanks I read they attain 4 inches in length but I know some species are fine while other need a wider tank so rainbows must be one. I think I read 4 feet on the profile here just now so they are out for sure.

I'm trying to think of something a little bit different, I'll definitely 100% add one more bronze cory. So that gives me 3 bottom feeders. Any ideas on something that would do well in my tank that would get along with my corys as bottom feeders? I did some research on panda corys but ....eh.... they are not seeming to exciting at the moment.

So if you guys are familiar with any really neat bottom feeders please share!
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post #6 of 9 Old 09-04-2011, 07:09 PM
I would add 3 more cories.. any species as long as the 3 new ones are the same. You should see a difference in thier behavior once you get a few more in there. In a 20g your options are still fairly limited. Many bottom feeders grow quite large and need a 55g+
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post #7 of 9 Old 09-04-2011, 07:13 PM Thread Starter
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The pair I have are actually extremely outgoing and social within the tank, definitely my most entertaining fish so far. That's why I've been interested in getting similar fish since my tank upgrade.

Would any cory do okay? Or do some species get too large? I've only ever seen corys at the pet shops that say they reach 3.5inches max.

I was considering smudge spot corys if I can find some.
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post #8 of 9 Old 09-04-2011, 07:25 PM
Well add one more bronze for sure.. then the other 3 can be whatever.
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post #9 of 9 Old 09-05-2011, 02:46 PM
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I agree with the advice from other members that you can increase the existing species or get others. I know of no cory species that will not get along just fine with other corys regardless of species. It is best to have 3 of each species minimum, but even more corys of another species would be better. Up to you; there are now close to 200 identified species, and I don't know how many others not yet described and named, so you've plenty to choose from. And the majority remain within the "standard" length of 2-3 inches. Check out our fish profiles, look under Catfish, there are many species there. Some being wild caught may be more sensitive to water parameters.

Aside from the above, you also have a few options for interesting substrate fish. One of my favourites is the Whiptaill Catfish. A 20g is fine, and this fish is also very peaceful. I have one in with my 40-odd corys (in a 115g tank of course). Make sure it is the Rineloricaria species in the profile though; there are some similar-looking "whiptails" that get much larger.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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