Cory catfish is twitching

[RainGamma]

Do I see a betta in the background? It could happen that the betta has attacked the cory. What is the substrate? It looks too rough for cories, they need sand.

This is what i use, https://www.petco.com/shop/en/petco...MI8P7L8uvb6QIVi7bICh3s_gzlEAQYASABEgIehvD_BwE

 

[Salty&Onion]

'Imagitarium Black Sand Aquatic Substrate sets the stage for a bold and demure aquatic environment. The black aquarium sand stands still as you set the surreal scene with iridescent fish and vibrant coral reefs. This fish tank gravel facilitates beneficial bacteria while offering fresh or saltwater fish a wonderful world.'

It's gravel, they mention it as sand and gravel which is confusing lol.
On both photos of the "sand gravel" (your and shop's) looks too rough for cories. Corydoras like to sift through their substrate, and their natural environment is made out of sand.

 

[RainGamma]

'Imagitarium Black Sand Aquatic Substrate sets the stage for a bold and demure aquatic environment. The black aquarium sand stands still as you set the surreal scene with iridescent fish and vibrant coral reefs. This fish tank gravel facilitates beneficial bacteria while offering fresh or saltwater fish a wonderful world.'

It's gravel, they mention it as sand and gravel which is confusing lol.
On both photos of the "sand gravel" (your and shop's) looks too rough for cories. Corydoras like to sift through their substrate, and their natural environment is made out of sand.

Okay so what should I change it for?

 

[RainGamma]

'Imagitarium Black Sand Aquatic Substrate sets the stage for a bold and demure aquatic environment. The black aquarium sand stands still as you set the surreal scene with iridescent fish and vibrant coral reefs. This fish tank gravel facilitates beneficial bacteria while offering fresh or saltwater fish a wonderful world.'

It's gravel, they mention it as sand and gravel which is confusing lol.
On both photos of the "sand gravel" (your and shop's) looks too rough for cories. Corydoras like to sift through their substrate, and their natural environment is made out of sand.

Idk it feels soft to me, I’m just gonna keep doing 50% water changes for a week and see what happens, I will report anything That happens

 

[RainGamma]

I think it was a false alarm or I might have been looking at the wrong cory

 

[Salty&Onion]

Cories should have really fine sand as a substrate.

 

[JuiceBox52]

Imagitarium sand is ok. It does look rough but its soft

 

[RainGamma]

Imagitarium sand is ok. It does look rough but its soft

im just feel very hopeless right now, I don’t know what’s wrong with my Corys I’m just gonna keep doing water changes and hope for the best

 

[Salty&Onion]

Imagitarium sand is ok. It does look rough but its soft

I never met that sand.. but ok.. I meant it does look scary and rough lol

 

[JuiceBox52]

I never met that sand.. but ok.. I meant it does look scary and rough lol

I think it's only in America

 

[RainGamma]

WHAT IS THAT

 

[JuiceBox52]

WHAT IS THAT View attachment 105808

could you circle the thing in question?

 

[Salty&Onion]

Can you describe what you see? I cannot see anyhting on the photo.

 

[RainGamma]

could you circle the thing in question?

It looks like some skin or something

 

[JuiceBox52]

It looks like some skin or something

On the rock??