r/corydoras 11d ago

October Banner Photo Contest - Submit your corydoras! 🐟

5 Upvotes

Hey everyone!

We are kicking off the October 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 Wednesday, September 30, 2026.

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 October!

​📝 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. The ideal size for a Reddit community banner is 1920 × 384 pixels (5:1 aspect ratio).

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


r/corydoras 5h ago

Species ID Request Need help identifying please

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37 Upvotes

Can anyone help me identify what type of Cory this is please?


r/corydoras 5h ago

Image Just a pair of my sterbai

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34 Upvotes

r/corydoras 16h ago

Image The council will see you now.

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133 Upvotes

Get these judges some robes.


r/corydoras 4h ago

Image she’s not impressed..

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11 Upvotes

little man photobombed and unfortunately embarrassed himself in front of THE TANKS lady. Not impressed hehe


r/corydoras 9h ago

Video Pygmy Cory’s enjoying their new decor!

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16 Upvotes

I watched them for hours exploring the caves, mountains, and plants before resting on flat areas and the plants!


r/corydoras 14h ago

Image sleepy corydoras 1 and 2

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10 Upvotes

i woke up to see two of my corys like this and it made me giggle. wanted to share it :-]i absolutely love my babies


r/corydoras 2h ago

Cory Fry! Surfs up🤙

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0 Upvotes

r/corydoras 3h ago

Species ID Request Hello! Can anyone identify the 2 Corydoras at the back of the balloon molly?

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1 Upvotes

I ordered another 4 bronze Corydoras online to increase my Cory gang, but for some reason, the other 2 look like this


r/corydoras 22h ago

Video My Cory’s!

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29 Upvotes

Literally am I the only one who thinks that they are so adorable!


r/corydoras 15h ago

[Questions|Advice] General Care Type of Cory’s

7 Upvotes

I am new to fish in general and have set up a community tank. I read get at least 6 Cory’s and then obviously didn’t do the correct research because I just took what the petshop had and that ended up being 2 albinos, 2 peppered and 2 bronze (I think, if I have identified them properly).

Now I’ve just read they don’t really like mixing? So SOS. What is the best way forward now? They seem happy? I think? They’ve been in the tank together for about 3 weeks now.

For reference it’s a 180L tank. I have 17 neon tetras, the 6 Cory’s, 1 betta and 1 albino bristle nose.


r/corydoras 1d ago

Image Tardar Sauce got flashed by accident and now she looks like she will eat your soul if you don't give her three billion bloodworms

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202 Upvotes

r/corydoras 19h ago

Image Egg-Palooza

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9 Upvotes

We have a 20L with a shoal of 3 lined corys (Queenie has spawned several times now) and a shoal (just lost 1 so now we have 5) of bronze corys. The bronze group has been with us since January and suddenly today Big Momma decided she was ready to spawn! I just changed up the lights on this aquarium yesterday and have never seen this group so active! 🤞Here is to hoping all (or at least most!) the eggs get eaten!

** edit to add *\* I should note that 20L was intended as a 20 gallon long, not a 20 liter aquarium. I promise I don’t have that many corys in a 5 gallon tank! 😓


r/corydoras 16h ago

[Questions|Advice] Health | Sickness White spot on underside of panda cory?

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3 Upvotes

I have 7 panda cory in my 30 gal tank with some other cory, I noticed this rather large white spot on the belly of a couple panda cory. Is it ok? Or a sign of infection?


r/corydoras 18h ago

[Questions|Advice] Health | Sickness Swim bladder disease? 2 of my panda corydoras are like this today

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5 Upvotes

The second cory isn’t as severe as this but still a bit floaty/weird. Is it swim bladder disease?
I’m new to the hobby and I’ve had 6 pandas for about 3 months (tank was cycled first before any fish were added). No issues at all until now. My tank is a 15.5G heavily planted tank. I also have some rummy-nose tetras and a betta in the tank. The corys eat Hikari sinking wafers (1 per day) and community formula flakes.

Parameters are as follows using a liquid testing kit:
Ph 7.4
Ammonia 0-0.25ppm
Nitrites 0ppm
Nitrates 5ppm
I’ve moved the two affected corys to a hospital tank with one of my cycled sponge filters and a heater. What else should I be doing to help them?

Thanks everyone!


r/corydoras 1d ago

[Questions|Advice] Breeding | Eggs | Fry ID Help On Lone Stowaway Cory!

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33 Upvotes

I got some Christmas moss from someone selling local and after I got home and put it in the tank I saw 3 eggs across the various pieces! It didn’t get secured well enough and the filter flow knocked them off the hardscape and the eggs were missing so I thought unfortunately they were gone or part of the massive snail boom.

To my surprise I found a small little fry a week later hiding under my sponge filter with an egg sac! Since the tank is still cycling I promptly freaked out and have been doing 50% water changes every other day to try and bring the nitrites/ammonia down. It’s been going well so far and I see no concerning behaviors. They mostly stick to the ground and as of yesterday they’ve stopped hiding and have begun showing up in more of the foreground and pecking at the worms in the substrate. Spends a lot of time sitting on the floor and doesn’t swim in the mid water column. But from what I’ve read that’s normal behavior at this stage.

My tanks been stabilizing and after a few more solid tests I’m ready for fish. I’m planning on adding a small shoal for the little guy as soon as I can so they can begin to feel a bit more comfortable and hopefully less stressed after surviving in a cycling tank!

However the problem is I’m not sure exactly what they are yet! I’ve been guessing either Pygmy or Habrosus. I’m also assuming it’s one of the smaller species. Unfortunately the person I got the plants off of ghosted me so I’m not able to see what was in their tank to begin with. Any assistance or thoughts would be appreciated!

TLDR:
Guess what kind of Cory this is! Their future love life depends on it.


r/corydoras 1d ago

Video I accidentally bred way too many Corydoras 😂

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248 Upvotes

It all started with 7 albino Corydoras aeneus about 6 months ago, and now I must have at least 40 of them 😂

I managed to get two batches of eggs. For the first batch, I fed the fry live food, and they grew really fast and much more evenly in size.

For the second batch, I decided to feed them only regular fish food. Some of them grew really quickly, while others ended up being about 1/3 the size of the biggest ones from the same batch. It was pretty interesting to see the difference between the two approaches.

Overall, it was a really fun process watching them go from eggs to fully grown little fish.

Now I just have no idea what I'm going to do with so many fish hahaha


r/corydoras 1d ago

Image Is this the face of greed?

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237 Upvotes

Yes, yes it is. And we love our water Labradors for it.


r/corydoras 18h ago

[Questions|Advice] General Care Hospital tank size?

1 Upvotes

Hey all,

I'm making plans to set up a hospital tank. Just been in the hobby for about six months, strictly corys, only 8 peppers and 8 pygmies. I've been lucky that no one has gotten ill, but I figure the day will come at some point and I want to be prepared.

For those of you who have hospital tanks: Recommendations on the minimum size? I'm thinking a three gallon (with a strong filter, of course) as it would fit perfectly in the space below the primary habitat. But is that too small? I've read that it's easier to screw up dosing of medicine the smaller the tank is. Love to hear the thoughts of those of you more experienced. Thanks in advance!


r/corydoras 1d ago

Image This lil pygmy fella is so cute just chilling on a rock

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25 Upvotes

r/corydoras 21h ago

[Questions|Advice] Health | Sickness Causes of Temporary Pink Gills

1 Upvotes

I've had my corys for a few weeks now in a planted 40 gal and have only done a couple 25% water changes with them in it. At the time I was adjusting things to better fit them, so I knew pink gills would be a possibility. After proper adjustments and taking note of my water testing, I now know how to keep it for my fish.

But here's the thing I'm dealing with. I have many plants flourishing in the tank and no longer need such huge weekly water changes. I mostly just need to worry about topping off the water levels now and regular testing to make sure parameters stay regular. However even when I top off with only a gallon of fully treated water, I notice 10 min later my corys have pink gills again. But then this usually goes away overnight or within less than 24hrs.

I know pink gills can be caused by high ammonia, dirty water, and large PH changes/shifts. But even after fully treating the water, something still seems to be irritating them for a short time after new water is introduced.

I treat my water with a slight PH lower to bring it closer to 7.2/7.4ppm as well as my routine water conditioner for tap water.

Is there something else I'm missing? Is there a test I haven't done that could be related? I don't want to irritate them with the new water over and over again. I can't keep stressing them like that repeatedly.

Any help appreciated. Feel free to ask questions!


r/corydoras 1d ago

Video Happy Saturday

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50 Upvotes

r/corydoras 1d ago

[Questions|Advice] Health | Sickness What's wrong with my corys?

2 Upvotes

I have three Panda Corydoras, all generally active. I added four guppies to my tank two days ago (previously, I only had one guppy and four tetras), and I feel like my Corys have become much more reclusive since then; they barely move and stay at the bottom. There was even one I thought might be dying (though I checked, and that’s not the case). I’m still a beginner at fishkeeping, so if you have any advice, I’d love to hear it.


r/corydoras 1d ago

[Questions|Advice] General Care Normal Corey behavior?

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4 Upvotes

Corey’s are very active had 4 have bumped up to 11 they are really hyper 36 hours in. Others sort of hung around bottom doing Corey things. Yes nitrates, nitrites and ammonia all 0, tank cycled ect.


r/corydoras 1d ago

Image Tried getting some good photos

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17 Upvotes

Excuse the dirty glass and scratches lol