Welcome to /r/corydoras!

Sorry about th

Had a slight temperature drop and a rainy night here so my Cory's (Pandas and Pygmys) went on a breeding spree.

Well I'm guessing my Pygmys did, im not sure, i thought they were too young. I know my Panda eggs are in the circle but are the smaller ones in the square from my Pygmys?

I never actually saw my Pygmys lay but did catch the Pandas lay some. And yes the eggs are on the same bit of glass.

Very weird scenario here..

I have a very docile, cute Male halfmoon in a 65L tank with 6 Juli corydora's and 6 danios.

I noticed after a few months the betta started to hug and chill out near the water heater? I thought he just liked perching himself up there but then I caught the Danios sort of patrolling around him whenever he'd swim near the bottom of the tank. So I thought maybe the danios were stressing him out.

But then I started noticing one particular Corydora with a very short right front fin (the only different looking corydora) getting quite aggressive towards the betta, Running up the glass if he's nearby, what looks like fin nipping and chasing too.

I had no idea corydoras would chase and fin nip a betta? What's weird is I never saw him fight back?

I'm thinking of surrendering that single corydora to a nicely run aquarium place but i'm unsure if that's the right thing to do? I currently have the beta in a temporary 12 Litre setup until i can go to the aquarium store in the next day or so.

Would I need to get another Juli Corydora in place of the Aggro boy? Or would 5 familiar corys be okay? The other five seem to never annoy the betta and all get along.

Thought it was really cute seeing a loafing cat then I looked closer. If it is popeye… there’s nothing you can really do is there?

I've had my corys since September. They are Corydoras Sodalis (sold to me as agassizii, surprise surprise) and have been doing pretty well other than that they're incredibly skittish.

The only thing I've noticed is that one of them stays incredibly pale. The other corys have very dark patterns, but this one has been super pale since I got them.

They get ground feeder and algae tabs, cory granules, and frozen artemia or tubifex, alternatively. Sometimes they get live feed as well. Water parameters are all normal.

Anyone know if I should be worried about this? I've been keeping an eye on him and he seems to be active and healthy otherwise, but this is my first time keeping fish and the corys are so shy with the lights on, I can only gage their activity when it's darker and by then I can't tell them apart.

Thanks so much!

I also posted this to r/Aquariums and r/fishtank to get as many opinions as I can

Hi, I’m planning on adding Sterbai Corydoras to my Tank and am looking for advice on numbers. I’ve been getting mixed recommendations (as low as 5 and as high as 18) and wanted to get more opinions.

Info: My tank is a 29 Gallon (30x12x18) with a Fluval 307 filter. I have 9 Diamond Tetras and 1 Bristlenose Pleco. Have a few very small anubias nana petite plants attached to 2 driftwood pieces, a bunch of artificial plants (various heights), a fairly large cave-like decoration, a circulation pump and the substrate is smooth gravel (heard it’s ok if it’s smooth and feed bloodworms as they lay on the top more). I do 30% or so water changes every week/week and a half.

I know the more the better, but since they’re bottom dwellers, I also want as many that can live happily full grown still giving the Pleco plenty of space. I’ve read they get to 2-2 1/2 up to 3 inches (with females being the larger ones) but I’m bad at visualizing. Also some people have described them as larger and some not which confuses me.

Questions:

• Does gender ratio matter if I don’t intend to breed them? I’ve heard both opinions that it does and doesn’t matter. My LFS said more females is better for behavioural reasons.

• Is the difference between genders large enough that the ratio I have will change the ideal number of each?

• With the ideal ratio, what would be the best number of females and males to live comfortably? (with the Pleco space wise)

• Is it ok to add them all in the tank on the same day?

Appreciate any advice!

*edit - clarification on questions.

Have 10 Pygmy corys in my 130L tank and wondered if there is an easy way to sex them? It’s hard to get pics of them as they are small lol but is there a way I can do it myself? I got them a month ago and they are about 1-1.5cm.

curious about these white spots on two of my cories? seem to be acting normally and eating

My pandas have been laying eggs for a couple months. Pretty sure they all kept getting eaten, so I bought one of those little mesh breeder boxes that hang in the tank. Had one set of eggs on the thermometer, so I just stuck the whole thermometer in the box and they hatched out.

Now I’ve got more eggs on the glass in a spot where they usually get eaten. Can I just roll them off and drop them into the breeder box? Or do they need to be stuck to the side of it or placed in Java moss or something?

Was really concerned when I saw my Cory this morning but after some googling found out that our baby is gonna be a mom!! This is Winky, mother to be.

First time dealing with eggs (bronze corys). There’s a lot more in back and scattered all over the fern. The tank is decently planted. You can check what it looks like in my profile.

I don’t have the space yet for keeping THAT MANY but keen to raise a few for the experience.