Corys Hugging Surface

All posts regarding the care and breeding of these catfishes from South America.
Post Reply
Popeye
Posts: 11
Joined: Wed Feb 14, 2018 4:56 pm
My cats species list: 4 (i:0, k:0)
My aquaria list: 2 (i:2)
Spotted: 1
Location 1: USA
Location 2: Michigan

Corys Hugging Surface

Post by Popeye »

I have a 50G tank with about 30 assorted tets - rummynose, candy cane, pristellas, and blood fins.
I have 6 pepper cats (corydoras paleatus), 3 small albino corys, 3 kuhli loaches and a 2 small plecos.
They have all been together for many months - the paleatus have been in that tank a year. All of a sudden my paleatus are hanging at the surface. All my water parameters check out fine. Temp is constant 80F always. I am very vigilant with water changes, etc.
Any thoughts on the sudden change? It is ONLY the paleatus that have changed their activity. I don't know if they're looking for food or looking for air. The filter is working fine, surface area breakup and flow haven't changed.
Any ideas?

User avatar
Reindas
Posts: 63
Joined: Wed Jan 09, 2019 2:54 pm
I've donated: $25.00!
My cats species list: 7 (i:7, k:7)
My aquaria list: 4 (i:4)
My BLogs: 1 (i:5, p:52)
My Wishlist: 3
Spotted: 8
Location 1: Bayamón
Location 2: Puerto Rico
Interests: Catfish , Photography, Computers, Star Trek.

Re: Corys Hugging Surface

Post by Reindas »

Hi,

You got a mystery there. I have had one cory "Hugging the Surface". I was a panda and sadly it died 2 days later. But all member of the species in a tank no. I hope you your don't end the same as mine.
Regards.

I love my Corys! (*)

dw1305
Posts: 937
Joined: Thu Oct 22, 2009 11:57 am
Location 2: Bath, UK

Re: Corys Hugging Surface

Post by dw1305 »

Hi all,
Popeye wrote:
Wed Mar 25, 2020 9:49 pm
I have 6 pepper cats (corydoras paleatus), 3 small albino corys, 3 kuhli loaches and a 2 small plecos.
They have all been together for many months - the paleatus have been in that tank a year. All of a sudden my paleatus are hanging at the surface. All my water parameters check out fine. Temp is constant 80F always. I am very vigilant with water changes, etc.
Any thoughts on the sudden change? It is ONLY the paleatus that have changed their activity. I don't know if they're looking for food or looking for air. The filter is working fine, surface area breakup and flow haven't changed.
Any ideas?
It is likely to be an oxygen issue.

Could you add an air stone? and reduce the water temperature? and is it a planted tank?

cheers Darrel

Popeye
Posts: 11
Joined: Wed Feb 14, 2018 4:56 pm
My cats species list: 4 (i:0, k:0)
My aquaria list: 2 (i:2)
Spotted: 1
Location 1: USA
Location 2: Michigan

Re: Corys Hugging Surface

Post by Popeye »

Thanks guys -
I'll try lowering the temp a little and move my water flow intake up to get more surface area exposed for oxygen exchange. I think I'll also move the 3 larger Roseline Sharks to a different tank - very active and use a lot of O2. Every little bit may help.
Thanks again.

Popeye
Posts: 11
Joined: Wed Feb 14, 2018 4:56 pm
My cats species list: 4 (i:0, k:0)
My aquaria list: 2 (i:2)
Spotted: 1
Location 1: USA
Location 2: Michigan

Re: Corys Hugging Surface

Post by Popeye »

Sorry Darrel, missed your last question - yes, it is a planted tank - swords and java ferns.

Bas Pels
Posts: 2687
Joined: Thu Dec 21, 2006 8:35 pm
My images: 1
My cats species list: 27 (i:0, k:1)
Spotted: 4
Location 1: the Netherlands
Location 2: Nijmegen the Netherlands
Interests: Central American and Uruguayan fishes

Re: Corys Hugging Surface

Post by Bas Pels »

The C paleatus are the only fish in your tank preferring cold water, and colder water can contain more oxygen than warmerwater. Further, a fish in warm water will need more oxygen than in cold water.

That is, your C paleatus could very well be the most sensitive to low oxygen levels - even though Corydoras are able to breath atmosferic oxygen through their guts.

80 F, that is 27 C, is further a bit high for them
cats have whiskers

William21
Posts: 9
Joined: Mon Mar 23, 2020 11:24 am
Location 1: Dorset
Location 2: UK

Re: Corys Hugging Surface

Post by William21 »

I’m no expert but I’d add an air stone if I had a pump and see if it helps.

Post Reply