Cory only tank (For future reference) - The Planted Tank Forum
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post #1 of 17 (permalink) Old 09-09-2014, 07:01 AM Thread Starter
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Cory only tank (For future reference)

What is the smallest tank I could use for a cory only tank? Would a 20L be too small? Thinking 8-10 cory's. So many great varieties if I can set up some smaller tanks down the road that are less expensive it would be great.
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post #2 of 17 (permalink) Old 09-09-2014, 02:02 PM
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A friend of mine has had good luck with with 5 pygmy cories in a 20L/5G. Hard to say if they are surviving vs thriving though.

A 20L would be too small for a school of regular size corys. A 20L is pretty much only good for a Betta, shrimp or possibly a small school of pygmy fish.

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post #3 of 17 (permalink) Old 09-09-2014, 03:04 PM
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Cool

I think he meant 20 long, i so a 20 long would be an awesome cory only tank.
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post #4 of 17 (permalink) Old 09-09-2014, 03:32 PM
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Sort of a side track, but I have a 40 gallon with 5 cories and they love schooling with my school of Harlequin Rasboras. Its a beautiful thing to see, you may want to consider adding them to your stocking list.
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post #5 of 17 (permalink) Old 09-09-2014, 04:09 PM
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A 20 Long is probably the minimum to keep a Cory-only school, though it'd depend on exactly which species. Some Cory's do get pretty big, and really should be in a 30 minimum.

If it's Cory-only, and if you aren't talking about Pygmy's, I wouldn't go any lower than 20L.
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post #6 of 17 (permalink) Old 09-10-2014, 12:02 AM
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Your almost doing the same thing I plan with my rack tanks. Of the 8 40g breeder tanks I will be setting up, each tank will feature one type of Cory and one type of tetra. So to answer your question, I would go as big as you can. Cories breed easily when conditions are in their favor. If you like cories as much as I do, I would give them plenty of real estate to expand and explore.

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post #7 of 17 (permalink) Old 09-10-2014, 12:11 AM
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Heavy plants / large footprint of tank / good water quality / lots of corys = mad cory eggs

20L would work but I would get something like a 40 breeder if you want to pack it with a good school


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post #8 of 17 (permalink) Old 09-10-2014, 07:27 AM Thread Starter
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Heavy plants / large footprint of tank / good water quality / lots of corys = mad cory eggs

20L would work but I would get something like a 40 breeder if you want to pack it with a good school
Lol, exactly what I don't want to do as I'm just doing a duplicate of what I'm doing now, except the fish stocking would be different. The current 40B is costing me enough money as it is.

I think I'll wait and do a much bigger tank so I can put in like 4 different cory species, a dozen each, along with a bunch of tetras. Will be when I'm ready to do high tech. It will probably be quite awhile before I tackle that.
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post #9 of 17 (permalink) Old 09-18-2014, 07:01 AM Thread Starter
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Another stocking question for a 20g L

1 dwarf Gourami
10 tetras (Put in Lemon Tetras)
6 corys (Put in gold laser corys)

According to AqAdvisor with an EHEIM 2215 the filtration capacity should be 271%, the stocking level 85% and the weekly water change 36%. If a setup like that would work it would let me have multiple tanks with a different species setup in each tank, which would be awesome.
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post #10 of 17 (permalink) Old 09-18-2014, 05:45 PM
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Originally Posted by derik999 View Post
Another stocking question for a 20g L

1 dwarf Gourami
10 tetras (Put in Lemon Tetras)
6 corys (Put in gold laser corys)

According to AqAdvisor with an EHEIM 2215 the filtration capacity should be 271%, the stocking level 85% and the weekly water change 36%. If a setup like that would work it would let me have multiple tanks with a different species setup in each tank, which would be awesome.
That should work just fine. I had corys in my 29 two years ago and they regularly spawned. Their tankmates were 3 gouramis and 10-12 neon tetras.

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post #11 of 17 (permalink) Old 09-27-2014, 01:08 PM Thread Starter
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If I added a swordtail would I be overstocked?
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post #12 of 17 (permalink) Old 09-27-2014, 02:37 PM
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I have a 20 Long with similar stocking (cories and tetras), although without the Gourami. I have 3 cory duplicareus and I'm picking up 2 more this weekend, 5 kerri blue tetras and I'm adding 5 more this weekend, 2 otos, and lot of RCS. There's also one lone panda cory left from a previous school, but he's now schooling along with the duplicareus.
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post #13 of 17 (permalink) Old 09-27-2014, 03:04 PM Thread Starter
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I have a 20 Long with similar stocking (cories and tetras), although without the Gourami. I have 3 cory duplicareus and I'm picking up 2 more this weekend, 5 kerri blue tetras and I'm adding 5 more this weekend, 2 otos, and lot of RCS. There's also one lone panda cory left from a previous school, but he's now schooling along with the duplicareus.
There are so many different species in such a broad range of amazing colors, makes it hard to choose!
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post #14 of 17 (permalink) Old 09-27-2014, 03:05 PM
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Skip the swordtail. They are hard water fish. The others you list are soft water fish.
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post #15 of 17 (permalink) Old 09-27-2014, 04:49 PM Thread Starter
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Skip the swordtail. They are hard water fish. The others you list are soft water fish.
Thanks for the tip Diana!
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