Corydoras Disappearance

[mark4785]

I recently treated one of my Corydoras for the Pop-eye condition which it acquired after eating the flesh of a deceased Black Neon Tetra. I decided to turn the fish tank lights off for 48 hours to allow it to rest and recover.
 
On turning the fish tank lights back on I cannot find this fish. I have checked behind the filtration unit, power-heads, have sifted through the sand, and have checked the ballast to factor in that it may have jumped out of the water and got lodged there. I am not able to find this fish in any of these locations.
 
Are Corydoras intelligent enough to aim for openings in the lid so as to escape? Any pointers/tips would be good at this point. 
 
Note: I'm not 100% sure if it is deceased as there is no bad odour emanating from the aquarium.

 

[DoubleDutch]

They are intelligent enough, but they won't escape that way.
Think it died and was eaten bij snails, shrimp, bacteria, other fish, aso

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[AbbeysDad]

I was missing a fish once and couldn't find it anywhere....until I removed a rock in the tank. It had squeezed in behind and under and could not be seen from any angle. So the Cory could still be there somewhere.

 

[mark4785]

They are intelligent enough, but they won't escape that way.
Think it died and was eaten bij snails, shrimp, bacteria, other fish, aso

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 In 48 hours it can be eaten beyond recognition? There are only 2mm snails in there with 2 other Corydoras. Its basically a quarantine tank which is barely stocked. 

 

[Baccus]

Depending on the species of snail and the snails size and numbers (and the fishes size) I have seen snails basically skelatonise a fish in a very short amount of time. If there where a lot of snails and the cory was only fairly small ie not full grown, then I have no doubt that a swarm of snails could reduce a fish to nearly only some bones in as little as a day or two.

 

[DoubleDutch]

They are intelligent enough, but they won't escape that way.
Think it died and was eaten bij snails, shrimp, bacteria, other fish, aso

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 In 48 hours it can be eaten beyond recognition? There are only 2mm snails in there with 2 other Corydoras. Its basically a quarantine tank which is barely stocked. 

That quite fast, but more likely than jumping out.

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