Having trouble with pygmy corys... - Betta Fish and Betta Fish Care
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post #1 of 18 (permalink) Old 10-28-2017, 02:09 PM Thread Starter
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Having trouble with pygmy corys...

I did have 8 corys, 5 chilis and 3 otos but now I'm down too 5 chilis, 3 otos and only see 2 maybe 3 corys. Any idea what's going wrong? I acclimated them with the drip method for about an hour or two. They have been slowly dieing off. Had them for a week now.

My tank is a 10 gallon with live plants, many anubias! The temp. Is about 75 to 78 degrees. I have a small 10 gallon sponge filter. I feed them omega one flakes plus at times algae wafers.

My readings:
Am: 0
Nit: 0
Nitrate: 5.0 to 10

I have taken out three dead corys but the rest are no where in sight. I did have some assassin snails in there that I have been taking out every time I see one. So I'm sure the snails are eating the dead fish. There is no trace of any sickness in the tank seeing the chilis thrive. Do you think the chilis are killing them off? I'm also wondering if I need an air stone for the corys but read that they breath air.

Unless they are all hiding really well I believe they are dying off. :( I might just stick to chilis in the tank if I can't keep the poor corys alive.

I hope I got all the info that was needed. If you need more let me know. :(



15 gallon: 1 Pea puffer, 5 harlequin rasboras, 5 neon green Rasboras, Clown pleco, Shrimp.
10 gallon: 2 betta's and a snail
10 gallon: 1 Pea puffer, two Guppies and 6 Panda loaches and shrimp.
5 gallon: Red Cherry Shrimp and snails
5 gallon tank: WIP tank
37 gallon: 2 F8 Puffers 7 bumblebee gobies.
My journal: https://www.bettafish.com/144-journa...ournal-46.html
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post #2 of 18 (permalink) Old 10-30-2017, 07:13 AM
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With all species of corydoras, you can't acclimate them you have to just throw them right into the tank. Reason is because when cory's stress out, they emit a chemical into the water to ward off enemies and such but it backfires on them when they're in the bag too long. So best to get them out asap and forget acclimation processes. I've done this with all the cories I've gotten (ranging from Habrosus up to Sterbai) and I've never lost one due to this method. This may only be one thing though, but for your future reference at least, get them in the tank as soon as you can.


Pygmeaus tend to be much more sensitive to pretty much everything over Habrosus which is why I like them personally.


What are your other params? pH, GH/KH?


Chilis definitely aren't killing them off, they might be curious fishes but they won't harm anything.

Wilds: Wajok, Rutilans, Siamentorialis, Hendra
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post #3 of 18 (permalink) Old 10-30-2017, 08:43 AM Thread Starter
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If I remember correctly ph was very high. A little over 8.0 (I checked this two weeks ago with my puffer) I can check again. As for the kh and gh. I have hard water that I know of. I'll use the kit later after work to know for sure what the test read for ya. But good to know about the corys! Thank you. :)



15 gallon: 1 Pea puffer, 5 harlequin rasboras, 5 neon green Rasboras, Clown pleco, Shrimp.
10 gallon: 2 betta's and a snail
10 gallon: 1 Pea puffer, two Guppies and 6 Panda loaches and shrimp.
5 gallon: Red Cherry Shrimp and snails
5 gallon tank: WIP tank
37 gallon: 2 F8 Puffers 7 bumblebee gobies.
My journal: https://www.bettafish.com/144-journa...ournal-46.html
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post #4 of 18 (permalink) Old 10-30-2017, 10:13 AM
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That's okay, gives me the ballpark is fine.
Cory's are softwater fish so perhaps they just don't like your higher pH and GH :-/ Some softwater fishes can adapt and others can't. Also, they may have been wild caught? Did they tell you from the place you bought them from? That may also make a difference.

Wilds: Wajok, Rutilans, Siamentorialis, Hendra
Leopards: Luna, Astrael, Dorian, Cullen, Gallifrey
Gargoyle: Cloudjumper
African Fat Tails: Nox and Lux
Bearded Dragon: Stormfly
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post #5 of 18 (permalink) Old 10-30-2017, 10:18 AM
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I wonder if thats what happened to my albino corydoaras....

I never had goodluck with them, I thought it was because I got them from petmart (most fish are dead there...) but after buying one in a good store and taking him home, he didn't survive a week in the tank. I acclimated him and moved water inside the bag so that he can adjust to the new water.
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post #6 of 18 (permalink) Old 10-30-2017, 10:52 AM
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Have to jump in here: I have a Ph range of 8.8-9.2 and my Pygmies are doing fine. I never see them out, probably because there isn't much cover, but if I need to take down the tank/redo it/take everything out for some reason I can always find all 8. I use @lilnaugrim 's method. They are extremely stressed by temp changes/param changes at first but I've never had one die (with the exception of other reasons like params, other fish, etc.)

@AngelDemonWolf they do best in groups of 6 or more, so it was most likely the stress of being alone, not the stress of acclimating.

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post #7 of 18 (permalink) Old 10-30-2017, 10:56 AM
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@ThatFishThough

Oh it wasn't alone, I have 4 other corydoras in the tank, and the second time I got them I got 2 albinos.
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post #8 of 18 (permalink) Old 10-30-2017, 11:42 AM Thread Starter
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Quote:
Originally Posted by lilnaugrim View Post
That's okay, gives me the ballpark is fine.
Cory's are softwater fish so perhaps they just don't like your higher pH and GH :-/ Some softwater fishes can adapt and others can't. Also, they may have been wild caught? Did they tell you from the place you bought them from? That may also make a difference.
I tested the KH and the drops were 15 drops until it turned yellow. so YUP have very hard water indeed. the GH... well lets just say I stopped at 40 drops and it was part green part yellow ._.

I know the Chilis are wild caught because I remember the store saying they are harder to get due to the weather. but now since its warming up where they spawn they will be getting more chilis in the next two weeks. So I'm guessing yes they are wild caught. they were in the same tank as the chilis at least. I'll make sure to ask when I get more. and next time I will just add them in the tank asap. the drive is about 40 minutes. you think they will make it in the bag that long?

Quote:
Originally Posted by AngelDemonWolf View Post
I wonder if thats what happened to my albino corydoaras....

I never had goodluck with them, I thought it was because I got them from petmart (most fish are dead there...) but after buying one in a good store and taking him home, he didn't survive a week in the tank. I acclimated him and moved water inside the bag so that he can adjust to the new water.
YUP same here. minus the petsmart part. I went to a LFS to get my corys and Chilis and Otos. I know the reason why my chilis died. I had 8 in there at one time. the filter I used was sucking them up... poor things! I felt sooo bad too. T^T

Quote:
Originally Posted by ThatFishThough View Post
Have to jump in here: I have a Ph range of 8.8-9.2 and my Pygmies are doing fine. I never see them out, probably because there isn't much cover, but if I need to take down the tank/redo it/take everything out for some reason I can always find all 8. I use @lilnaugrim 's method. They are extremely stressed by temp changes/param changes at first but I've never had one die (with the exception of other reasons like params, other fish, etc.)

thanks for the help! much needed. I love these little things and right now two are thriving but I did see a third in there. looked kinda small. I will for sure get more and try again. If all else fails I might end up just with a large group of Chilis and the two otos.

@AngelDemonWolf they do best in groups of 6 or more, so it was most likely the stress of being alone, not the stress of acclimating.
Quote:
Originally Posted by AngelDemonWolf View Post
@ThatFishThough

Oh it wasn't alone, I have 4 other corydoras in the tank, and the second time I got them I got 2 albinos.
I'm sure it was from the poison they let out now that I know more about that issue. It just sucks that I had 8 in there and then now down too two very healthy ones. (PS: the little one is showing itself right now as I type this. VERY tiny and I hope its getting enough food. its not following the other two that are super close to one another.)



15 gallon: 1 Pea puffer, 5 harlequin rasboras, 5 neon green Rasboras, Clown pleco, Shrimp.
10 gallon: 2 betta's and a snail
10 gallon: 1 Pea puffer, two Guppies and 6 Panda loaches and shrimp.
5 gallon: Red Cherry Shrimp and snails
5 gallon tank: WIP tank
37 gallon: 2 F8 Puffers 7 bumblebee gobies.
My journal: https://www.bettafish.com/144-journa...ournal-46.html
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post #9 of 18 (permalink) Old 10-30-2017, 10:30 PM
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@Tree Poison that they let out? What do you mean by this?
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post #10 of 18 (permalink) Old 10-30-2017, 11:48 PM Thread Starter
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From what lil stated. Well. Not really poison. It's a chemical they spew out when stressed. Kinda like a toad? Maybe.



15 gallon: 1 Pea puffer, 5 harlequin rasboras, 5 neon green Rasboras, Clown pleco, Shrimp.
10 gallon: 2 betta's and a snail
10 gallon: 1 Pea puffer, two Guppies and 6 Panda loaches and shrimp.
5 gallon: Red Cherry Shrimp and snails
5 gallon tank: WIP tank
37 gallon: 2 F8 Puffers 7 bumblebee gobies.
My journal: https://www.bettafish.com/144-journa...ournal-46.html

Last edited by lilnaugrim; 10-31-2017 at 04:58 AM.
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