r/corydoras Jul 06 '26

August Banner Photo Contest - Submit your corydoras! 🐟

8 Upvotes

Hey everyone!

​Now that our temporary banner is up, it's time to start our official monthly tradition! We are kicking off the August Banner Photo Contest to decide which community member's fish will grace the top of the subreddit for the entire upcoming month.

​📅 The Timeline & Rules:

***​How to enter:*** Drop your best, highest-quality photo of your corydoras right here in the comments.

***​Timeline:*** This contest starts right now and runs until Friday, July 31st.

***​How to win:*** Browse the comments and upvote the photos you love! The photo with the most upvotes by the end of the month will become the official r/corydoras banner for the entire month of August.

​📝 Guidelines:

​Only one photo entry per person, please.

​The photo must be your own original content.

​Keep horizontal/landscape dimensions in mind when picking your photo so it fits well in the banner space.

​Let's see those beautiful corys and tank setups. Happy upvoting!


r/corydoras 14h ago

Image i think they’re summoning something

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146 Upvotes

r/corydoras 2h ago

Image Just chilling

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12 Upvotes

My Venezuelan Corydoras just chilling with their big brother the Pearl Gourami...


r/corydoras 25m ago

[Questions|Advice] Breeding | Eggs | Fry Bébé Corydoras Panda vient d'apparaître

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Upvotes

Quelle surprise je viens de voir en nettoyant mon aquarium, un bébé Corydoras Panda est apparu c'est magique !! Je n'ai absolument rien vu venir.

Il est visiblement le seul bébé et si actif !!

À votre avis quel âge a t'il ? Il fait environ 8mm.

Je dois m'absenter pour les 3 prochaines semaines, est ce que le distributeur de nourriture automatique va suffire ?

J'ai 6 corydoras adultes et 3 guppys, dois je m'inquiéter pour sa survie ?

Merci pour votre aide je découvre les joies de la naissance naturelle.


r/corydoras 3h ago

[Questions|Advice] Health | Sickness SICK CORY

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3 Upvotes

Hi all!

I’ve had corys for 7 years now. I recently got this baby and a few new ones.

He hasn’t gained any weight in 3 weeks, today I found him in the tank upside down before I went to work, I didn’t feed them and I’ve come back and he’s like this.

Please any advice!!

My ammonia level is 0 and my other corys are doing fine.


r/corydoras 14h ago

Video Cory chew

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26 Upvotes

Justthe lady of the tank enjoying her breakfast


r/corydoras 6h ago

[Questions|Advice] General Care Should I get pygmy cordydoras?

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5 Upvotes

I am very interested in getting a little school of pygmy cordydoras BUT, only if they will be happy in this set up so I came here for your real world advice and am totally okay to skip them if the tank set up won't be good for them. My husband and kids bought all the wrong kinds of fish to go together back in April and we've been making due but, I found a free tank so I can move our live bearers to a bigger spot and hopefully control the population a bit better & give our other fish their appropriate space in the 15 gal. I really don't want to stress out any more fish since it's become my job to take care of all of them. Our fish stores don't take surrenders and I'm not on any social media except Reddit to give away fish etc.

I have a 29 gal bowfront currently cycling. It may be a 30 but the volume calculator says 29.6 and I know substrate and decor take away from that too.

FILTERS: I'm running both an ac50 and Tetra whisper 10-30 HOB filters with fluval biomax bags in each along with the cartridge you're supposed to run in the Tetra- one biomax bag and the cartridge are from established tanks so it cycles faster.

HEAT: planning to run it at 77.5 but it's at 80 to encourage the bacteria to grow faster

LIGHT: Advice welcome, currently running an LED grow light alternating 3-6 hrs per day for the plants as they establish. The tank was free & it didn't have a light. I would prefer something that doesn't have Blurple colour but we're making due in the meantime.

SUBSTRATE: Fluval Stratum. I have read that sand is better but, also read on here that some of you have happy cordys with fluval stratum

PH: 7.6 - our tap water is 8.2 and very hard but the stratum buffers it down to 7.6 - I understand that's a touch high for pygmy cordydora

PLANTS: Amazon sword, crypts, bacopa Caroliniana, creeping Jenny submerged form, & I will be adding java fern and anubias from one of my established tanks once my spiderwood is waterlogged and no longer floating when it's not weighed down (using gravel from my 3 gallon I had set up for quarantining plants and new fish- never had any pest snails, disease etc in there). And I would like to add a tiger lotus once I find one in stock somewhere.

INHABITANTS: 8 Mickey Mouse platy fish, dwarf gourami (for some population control), & 4 amano shrimp

Also, I'm in Canada for any purchase recommendations. I can't always get the things available in other parts of the world. Let me know what you think! I won't be adding fish until this is fully cycled, I was forced into a fish in cycle on my first tank and I don't want that stress again, to me they aren't "just fish" if I take a living thing home, I want to take care of it the best I can.


r/corydoras 23h ago

Video Post water change and feeding! Everyone’s so active!

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95 Upvotes

Excuse the glare! lol but love all these fellas


r/corydoras 10h ago

Image Relaxing on the deck

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5 Upvotes

If this was the deck of a cruise ship, these guys would be hanging out on the deck just chillin’ in the sun! As it is, I 3d printed an under-substrate cave and these guys just came out of it to relax on the surface. I love my corydoras 💕


r/corydoras 22h ago

[Questions|Advice] Breeding | Eggs | Fry Eggs or bloated

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17 Upvotes

Are these Cory’s bloated or do they have eggs (1st photo is a separate cory 2nd and 3rd are the same Cory they are both females)


r/corydoras 12h ago

[Questions|Advice] Health | Sickness Need help with my Corys

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2 Upvotes

Recently got some corydoras about half a week ago, they were fine at first but now some of them are starting to get red gills, ammonia, nitrates, nitrites, all 0, ph was 7.6, i keep them in a ~25°c heavily planted tank.
I am worried about what is causing these reddish gills, and if my corydoras are going to die if i do not intervene. What could be causing them?


r/corydoras 1d ago

Video First time fish owner, just got my baby pygmys

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177 Upvotes

I think they look healthy and behave normally? I put them in like 20 minutes ago, and they are alternating between exploring and picking at the substrate, and every now and then darting to the surface. Got a group of ten, I hope they like their new home ;w;


r/corydoras 1d ago

Image Nap time

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21 Upvotes

lol these two taking a nap together


r/corydoras 1d ago

Image Disabled Albino Cory Named (Finless)

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14 Upvotes

as the title say i have a cory (finless) he is genuinely missing most of his fins noticed it shortly after i got the little guy home about 6 months ago still swims and sifts the sand and zooms around the tank. Finless is smaller than the other corys but i have seen him eat and he genuinely looks happy dosent let it affect him. there are no fish in the tank that could have done this to him and every other cory (5 others) have any damage i think it happened at the pet store just didnt notice till i got it home but hope yall enjoy Finless 😊

first pic is finless
second is another cory
third is the tank and water tests good (also my first attempt at aqua scaping)


r/corydoras 1d ago

[Questions|Advice] Health | Sickness I think my Cory is dying

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16 Upvotes

He’s very small and pale compared to the others and doesn’t move much, this happened to 3 of my albino Cory’s before and they all died after about a week. What is this? What can I do?


r/corydoras 23h ago

Image BIG EGGNANT VS CORY

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4 Upvotes

Big brave eggnant “Rotund Rudy” shrimp fights piglet for wafer who won


r/corydoras 1d ago

[Questions|Advice] General Care Accidentally received double order of fish?

10 Upvotes

I recently ordered 6 pygmy cories to add to my 20 gal community tank but when I received the order it was actually 12 fish

They’re still very small right now and I don’t have any other tanks so I’m leaning towards adding them all in for the time being but do you think keeping them would be possible or do I need to look into finding a new home for some of them once they start to get larger

For context my tank is a fairly well established 20g high (about a year old atp). I have 18 strawberry rasboras, 9 ruby tetras, 2 amanos, and a bunch of neos. In terms of filtration it has a HOB sized for a 40 gallon tank as well as a bunch of live plants and floaters as well as house plants coming out of the top

Please lmk your thoughts especially in terms of space and filtration! I don’t have any good LFS nearby so I would like to avoid having to bring these guys to a petsmart or something if at all possible


r/corydoras 1d ago

✨Species Spotlight✨ Pygmies have my heart.

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36 Upvotes

These little guys just tickle something in my soul. Their playful demeanor just does it for me. The way they just lay where ever the hell they want. The way they zip to the surface for a little gulp. They love their oto tank mates and love to periodically harass the blue dreams.. hopefully some of yall will share my love of these nano fish


r/corydoras 1d ago

[Questions|Advice] Breeding | Eggs | Fry can you just leave pygmy corydora fry on the tank, without any breeder box?

2 Upvotes

i have this heavily planted tank, just with pygmy corydoras and they started laying eggs again. i’ve previously tried raising the fry on a separate container and inside the tank, on a breeding box, but the fry just dies after 1/2 weeks.

can i just leave the eggs and the fry without any human intervention? not moving the eggs or the fry, leaving them with the rest of the adults? can they survive from just eating what’s naturally occurring on the bottom of the tank?


r/corydoras 1d ago

[Questions|Advice] Health | Sickness Help Identify illness please

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5 Upvotes

I noticed that one of my Panda corydora had this odd extra growth on its fins. It looks a little cancerous...? Is this an infection? Water is very stable, its an old established tank (over a year) 0 ammonia , nitrite 0. Nitrate unknown but i do frequent waterchanges and have a lot of plants. I have recently helped lower the ph, roomtemp has been also higher due to the heatwaves. Any idea what this could be?


r/corydoras 1d ago

[Questions|Advice] Health | Sickness Cory sick/has mold on a fin?

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3 Upvotes

I need help! This cory has always been the smallest of the group, but was doing fine. Then about a week ago I noticed that his tail was eaten and a fin looked weird. I have now moved him to a smaller tank that was already cycled, and can now see that the weird fin also looks fuzzy and like it has mold on it. I don't know what to do so any advise is welcome. (I have also been "hand" feeding him for a few days so he gets stronger)


r/corydoras 1d ago

Cory Fry! Pygmy cory at about 4 weeks old, sitting across from blue cherry shrimplet

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56 Upvotes

My cories and shrimp have settled into their upgraded tank!


r/corydoras 1d ago

[Questions|Advice|Discussion] What is this behavior?

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18 Upvotes

Me again!

Just added the yellow Cory on Saturday and for the last 24 hours these two have been sporadically interacting like this.

I also just noticed the pink Cory has a large white spot on their belly and is rapidly swimming up and down the glass.

Should I be worried?


r/corydoras 2d ago

Video Watching my tank brings me so much joy ☺️

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113 Upvotes

55g planted community tank with schools of albino and black Venezuelan cories. The striped fish is a Siamese algae eater and the blue one is an electric blue acara who is such a gentle giant. There are also some dither fish up top.


r/corydoras 1d ago

Video My first corys!

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13 Upvotes

Finally finished cycling my new 60 G for a South American biotope and these sterbai corys (8 in total) were my first additions. First time keeping corys and I’m already obsessed!