Corys and tank depth

[Larry Blanchard]

Had a friend who is fairly knowledgeable about fish tell me he'd seen
somewhere that corys don't like deeper tanks. Deeper being anything
over a foot or so.

Can anyone confirm or deny this? I'd like to put some in a 20H and/or a
50 breeder but don't want to if it's the wrong environment.

I haven't seen anything to that effect in any of the reading I've done.

--
It's turtles, all the way down

[NetMax]

"Larry Blanchard" > wrote in message
...
> Had a friend who is fairly knowledgeable about fish tell me he'd seen
> somewhere that corys don't like deeper tanks. Deeper being anything
> over a foot or so.
>
> Can anyone confirm or deny this? I'd like to put some in a 20H and/or
> a
> 50 breeder but don't want to if it's the wrong environment.
>
> I haven't seen anything to that effect in any of the reading I've done.
>
> --
> It's turtles, all the way down


The problem is in the definition of 'don't like', and in our
understanding of why they might not like it. The 2 bits I can put
together is that they come from highly oxygenated water (shallow, fast
moving), and some (all?) spawn in shallow water (however shallow might be
deeper than you think). Panda cory fry in particular will not survive in
a deep tank, and the norm is to lower the water level to only a few
inches, so the delicate fish can more easily make the trip to the surface
to gulp air. Everyone has seen corys take air gulps, so does a shallow
tank make that easier, or does a shallow tank have more O2 at the bottom,
so they need to take less gulps?

I suspect that in a tank with excellent circulation (high O2 at the
bottom, no temperature gradient, no dead spots) and clean water, that
adult corys would not care about the difference between a 12" or a 24"
tank, but jmo.

ps: I had C.aeneus (Bronze corys) who spawned a few times in a 24" tank,
whatever that might mean to your question.
--
www.NetMax.tk

[Richard Sexton]

In article >,
Larry Blanchard > wrote:
>Had a friend who is fairly knowledgeable about fish tell me he'd seen
>somewhere that corys don't like deeper tanks. Deeper being anything
>over a foot or so.
>
>Can anyone confirm or deny this? I'd like to put some in a 20H and/or a
>50 breeder but don't want to if it's the wrong environment.

1) I've never heard this.

2) The terra typica for Corydoras certainly includes steams deeper than 18" !


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[Jim Anderson]

In article >,
says...
> Had a friend who is fairly knowledgeable about fish tell me he'd seen
> somewhere that corys don't like deeper tanks. Deeper being anything
> over a foot or so.
>
> Can anyone confirm or deny this? I'd like to put some in a 20H and/or a
> 50 breeder but don't want to if it's the wrong environment.
>
> I haven't seen anything to that effect in any of the reading I've done.
>
>

I have unid'ed corys in my 38usg which is ~20 inches tall, got them at
only 3/8 inch sl. 6 months later they are 1.5 inches and doing fine
(lost one @ 2 months), except the smallest one spends time schooling
with the neon dwarf rainbows, which is kind of funny to watch him try to
keep up.

I had panda's in a 55usg for several years which is ~21 inches tall.

--
Jim Anderson
( 8(|) To eMail me, just pull "my_finger"

[Larry Blanchard]

> On Thu, 16 Feb 2006 18:52:25 -0800, Larry Blanchard
> > wrote:
>
>>Had a friend who is fairly knowledgeable about fish tell me he'd seen
>>somewhere that corys don't like deeper tanks. Deeper being anything
>>over a foot or so.
>>

Thanks to all for your responses. Seems I'm OK if I get adult, or at
least adolescent, cories and not babies, especially pandas.

I've got a chance to get some green cories that are already 2" or so - I
think I'll get them.

--
It's turtles, all the way down