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Corydoras aeneus eggs

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Post Mon Apr 20, 2020 4:35 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
I have a group of 9 plain ol' bronze cory's in my planted 40 breeder that lay eggs on the glass weekly. These guys (and girls) are underrated in my opinion. As a group, they are digging through the substrate in the same area or resting in the same area at the same time. It's the group mentality that makes them so interesting. They will all be resting and when the food hits the water, they all get going looking for their share - very cool behavior. The females are big and round while the males are slimmer with the same coloration.

Anyway, one of these times I'm going to pull the eggs and see if I'm able to raise them to BAP.

Here's a picture of one of the males and a picture of a group of eggs on the front glass.

Scott.
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Post Wed Apr 22, 2020 2:58 pm
meck3427 Level 4 Member
Level 4 Member

Posts: 119
Location: Apple Valley, MN
Cool stuff Scott. Agree that they are underrated. Any school of Cories is a blast to watch.

Just throw a breeder box on the tank and pull a few eggs. Surprised you haven't already found a couple stray juveniles swimming around.

Post Sat May 16, 2020 2:14 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
Thanks for the reply meck3427,

I was able to remove a batch of eggs and put them in a container. Only 4 hatched. Lost one and am raising the other three on baby brine shrimp. About 2 weeks old now and growing quite a bit.

Will try again and remove the next batch of eggs and hopefully to get a few more.

Scott.

Post Fri Sep 04, 2020 9:11 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
Pulled another batch of eggs off the glass and plants and am trying something different this time.

I placed the eggs in a Tupperware container.
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Post Fri Sep 04, 2020 9:18 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
Instead of adding methylene blue to help with fungus, I'm trying hydrogen peroxide.

I add 5 drops of hydrogen peroxide in with the eggs and fill the container with aged declorinated tap water. I change 100% of the water 2 times a day and add 5 drops hydrogen peroxide with each water change.
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Last edited by scott on Sat Sep 05, 2020 12:55 pm, edited 2 times in total.

Post Fri Sep 04, 2020 9:25 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
My basement is cooler year round so I use a clamp light with a incandescent bulb to keep the water at about 78 degrees Fahrenheit.

That's a brine shrimp hatchery dish behind the Tupperware container.
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Last edited by scott on Sat Sep 05, 2020 9:26 am, edited 1 time in total.

Post Fri Sep 04, 2020 9:28 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
I put a piece of black construction paper on top of the container to help soak up some of the heat from the incandescent bulb.
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Post Fri Sep 04, 2020 9:34 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
Day +5 Wigglers.

I continue with the twice daily water changes but stop adding the hydrogen peroxide now that the eggs are hatching.

Haven't counted but there's got to be 50 or so.
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Last edited by scott on Sat Sep 05, 2020 9:27 am, edited 1 time in total.

Post Fri Sep 04, 2020 9:42 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
Day +6.

I moved the Wigglers to a shoebox sized container along with a handful of guppy grass. I start to feed decapsulated brine shrimp eggs, live vinegar eels, and live micro worms. I think the guppy grass i pulled from a different tank has a bunch of paramecium that the Wigglers can feed on too.
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Post Fri Sep 04, 2020 9:53 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
Again, because I keep my aquariums in my basement which stays cooler year round, I float the shoebox sized container in a heated 10 gallon tank. I keep the temp at 78 degrees Fahrenheit and change 100% of the water daily.

On about Day +9 I start to add live baby brine shrimp and continue to add live vinegar eels and live micro worms for the Corydoras aeneus to feed on.
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Post Fri Sep 04, 2020 10:00 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
Here's what the Corydoras aeneus fry look on Day+21.

As you can see from their orange bellies (sp), they really feast on the live baby brine shrimp.

These fry are growing quickly and are about 1/2 inch long on Day+21.
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Post Fri Sep 04, 2020 10:21 pm
scott Level 4 Member
Level 4 Member

Posts: 119
Location: Buffalo, MN
Here's my water parameters I breed and raise Corydoras aeneus in -

pH = 8.2
tds = 303
KH = 15
GH = 18

So, I have high pH and very hard water in Buffalo, MN.

I age my water in 55 gallon plastic barrels for 3 or 4 days between water changes. I also use Seachem Safe each time I fill a barrel.

Scott.


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