Corydoras oipoquensis pale but otherwise normal?
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Corydoras oipoquensis pale but otherwise normal?

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Corydoras oipoquensis pale but otherwise normal?
Old 03-15-2012, 09:32 PM   #1
 
MinaMinaMina's Avatar
 
Corydoras oipoquensis pale but otherwise normal?

Perhaps this thread should be in the freshwater disease forum, but I put it here for two reasons- For one, the little guy I'm posting about isn't sick, per se. (You'll what I mean when you keep reading.) And for two, and frankly, the disease forum isn't much help, not enough activity over there.

So I'm gonna give a lot of detail, because maybe I'm missing something with these guys. So sorry its long, but maybe I'm missing something in the details. I hope someone has some suggestions!

So the story is that I got 4 Corydoras Oiapoquensis on February 4th at a local swap meet. (They look similar to Corydoras panda.) The room was pretty cold, and most everyone that bought fish there (of most any species) found their fish to be slow to rebound even when properly acclimated. I acclimated mine slowly, and they did okay.
They all have been very skittish from day one. They've actually made the other corys in there, 5 Corydoras trilineatus, much more skittish than previsouly, too. The only other fish in the 55g were 7 Bloodfin Tetra. There's also 1 Ghost Shrimp, MTS, Ramshorns, and (recently added) 2 Olive Nerite Snail.
All corys are about half grown, and the Bloodfins were almost grown. So, pretty lightly stocked.
They tank is still growing in, so plants are a bit sparse. But they have two good-size caves made by arches in driftwood that they've made good use of. There's plenty of cave space for everyone, with one cave on each side of the 55g. There's also some light leaf litter that forms a few hiding spots.
The tank has always been healthy, no sign of disease ever. All other fish are not only healthy, but vigorous and thriving.
The pH stays at 7.4, the water is moderately hard. The temp stays at 75-77F. Tank parameters are within ranges for oiapoquensis listed on various sites.
Ammonia and Nitrites are always 0ppm, and Nitrates stay at or below 10ppm.
I do 50% water changes every 1 to 2 weeks with siphoning off the top of the sand. (I know, I know! BAD Mina! Do my water changes EVERY week regardless, I know! My life has been especially turbulent lately, and I rationalize it because the tank is so lightly stocked and my parameters stay great. But, I know, shame on me. )

So 3 of the oiapoquensis look pretty good. They're colored well, and are eating well, there's certainly no sign of disease. They're not as active as the 5 trilineatus, but they get out and about sometimes. Like I said, they're skittish, and various sites confirm they're very shy.
The 4th oiapoquensis is also eating well, and certainly shows no signs of disease. But he rarely goes out of his cave, and his body color (the salmon colored part) is paler than the rest of his friends. The black on his eyes, dorsal fin, and tail stripes are normally colored.

Last weekend I sold all the Bloodfin Tetra, and had to totally break down the tank to get them out. This was stressful to all of the fish, but my 1 oiapoquensis lost nearly all of his color, even the black was just a light grey! Poor guy! I did a 75% water change at that time. His color was back to his usual (i.e. body color still pale) by the next day. Appetite was unaffected.

There is no aggression in this tank, all very peaceful.

Their staple is a sinking Omega One pellet. Occasionally they get a sinking Omega One shrimp pellet. They've had live black worms a handful of times, and I just got some more tonight. I'm going to add in some frozen daphnia tomorrow.

So what am I missing? What can I do to get the pale oiapoquensis thriving like the rest of the fish?

Thanks in advance! And even if you can't help, thanks for reading!
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Old 03-15-2012, 11:27 PM   #2
 
I would try not to feed for a day then give some peas or something that woul make them poo some times it may just be something stuck or hes just completely stuck hehe
one of my male black ruby wasent showing is usual im the dominant male color for a few days i tries that and within a week he was fine!
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Old 03-16-2012, 12:42 AM   #3
 
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Quote:
Originally Posted by MinaMinaMina View Post
Perhaps this thread should be in the freshwater disease forum, but I put it here for two reasons- For one, the little guy I'm posting about isn't sick, per se. (You'll what I mean when you keep reading.) And for two, and frankly, the disease forum isn't much help, not enough activity over there.

So I'm gonna give a lot of detail, because maybe I'm missing something with these guys. So sorry its long, but maybe I'm missing something in the details. I hope someone has some suggestions!

So the story is that I got 4 Corydoras Oiapoquensis on February 4th at a local swap meet. (They look similar to Corydoras panda.) The room was pretty cold, and most everyone that bought fish there (of most any species) found their fish to be slow to rebound even when properly acclimated. I acclimated mine slowly, and they did okay.
They all have been very skittish from day one. They've actually made the other corys in there, 5 Corydoras trilineatus, much more skittish than previsouly, too. The only other fish in the 55g were 7 Bloodfin Tetra. There's also 1 Ghost Shrimp, MTS, Ramshorns, and (recently added) 2 Olive Nerite Snail.
All corys are about half grown, and the Bloodfins were almost grown. So, pretty lightly stocked.
They tank is still growing in, so plants are a bit sparse. But they have two good-size caves made by arches in driftwood that they've made good use of. There's plenty of cave space for everyone, with one cave on each side of the 55g. There's also some light leaf litter that forms a few hiding spots.
The tank has always been healthy, no sign of disease ever. All other fish are not only healthy, but vigorous and thriving.
The pH stays at 7.4, the water is moderately hard. The temp stays at 75-77F. Tank parameters are within ranges for oiapoquensis listed on various sites.
Ammonia and Nitrites are always 0ppm, and Nitrates stay at or below 10ppm.
I do 50% water changes every 1 to 2 weeks with siphoning off the top of the sand. (I know, I know! BAD Mina! Do my water changes EVERY week regardless, I know! My life has been especially turbulent lately, and I rationalize it because the tank is so lightly stocked and my parameters stay great. But, I know, shame on me. )

So 3 of the oiapoquensis look pretty good. They're colored well, and are eating well, there's certainly no sign of disease. They're not as active as the 5 trilineatus, but they get out and about sometimes. Like I said, they're skittish, and various sites confirm they're very shy.
The 4th oiapoquensis is also eating well, and certainly shows no signs of disease. But he rarely goes out of his cave, and his body color (the salmon colored part) is paler than the rest of his friends. The black on his eyes, dorsal fin, and tail stripes are normally colored.

Last weekend I sold all the Bloodfin Tetra, and had to totally break down the tank to get them out. This was stressful to all of the fish, but my 1 oiapoquensis lost nearly all of his color, even the black was just a light grey! Poor guy! I did a 75% water change at that time. His color was back to his usual (i.e. body color still pale) by the next day. Appetite was unaffected.

There is no aggression in this tank, all very peaceful.

Their staple is a sinking Omega One pellet. Occasionally they get a sinking Omega One shrimp pellet. They've had live black worms a handful of times, and I just got some more tonight. I'm going to add in some frozen daphnia tomorrow.

So what am I missing? What can I do to get the pale oiapoquensis thriving like the rest of the fish?

Thanks in advance! And even if you can't help, thanks for reading!
What do you mean when you say you had to break down the whole tank? I ask this because sometimes when substrate is disturbed ,organics are stirred up that could cause brief ammonia spike and this, along with stress from activity while you were catching the tetra's could have affected the little guy negatively. Is alway's a good idea to do water change as you did after such disturbance in the aquarium and I would not be too worried at this time were it me.
Temp sounds good for these fish and assuming that no chemical's other than dechlorinator and or fertilizer is being used with tapwater? I would not worry too much.
I might try and add some Spirulina pellet's or New life spectrum pellet food to the fishes diet's just to ensure some vegetable matter. and spirulina is said to help boost immune system.
Sometimes despite our best care fishes succumb to various ailment's.
All we can do is provide regular (weekly )maint, and good diet .this will be the best medicine in nearly all cases.
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Old 03-16-2012, 12:37 PM   #4
 
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From your detailed description (thanks Mina) I would suspect it is just stress. I think we can be certain these fish were wild caught, unless there is a local breeder. This species occurs in the upper reaches of the Oyapock River basin in the French Guyana and into Brazil. The water is soft, and the ph is slightly acidic (low 6's). Some sources give 7.2 as the upper pH limit. Unless your water is hard, say above 10 dGH, I don't see problems here. Not all fish adapt as quickly to changes, and these fish have probably gone through some pretty scary times from their home base to your tank.
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