Who's eggs? - Page 3 - Tropical Fish Keeping - Aquarium fish care and resources
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post #21 of 31 Old 01-26-2010, 10:04 AM Thread Starter
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So what's up with the male cory....Are they just slow or not so fertile or WHAT?

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post #22 of 31 Old 01-26-2010, 11:51 AM
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Originally Posted by iamntbatman View Post
FrogHerder, many fish will lay eggs without them being fertilized. I'm not sure if bronze and peppered corydoras can hybridize (although I somewhat doubt it) so odds are that one is a female and simply laid unfertilized eggs.

I've had cories spawn pretty regularly but I've never attempted to save the eggs. The cories themselves are pretty enthusiastic about eating the eggs, so they're usually gone within 24 hours.
I figgered the odds were pretty low that the eggs are viable. Had a QT tank open, and thought I'd at least give them a chance.

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post #23 of 31 Old 01-26-2010, 05:06 PM
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So what's up with the male cory....Are they just slow or not so fertile or WHAT?
looks like the female holds the eggs in her fins then the boy comes and fertilizes them, then she sticks them somewhere. so they would be fertilized when stuck to the glass. i will try again next time she lays eggs.

47 gal tall freshwater - 6 Balloon Mollies, 6 Silver Sailfin Mollies, 2 African Black Knife Fish, Albino Bristlenose Pleco, Black Pleco, Black Algae Eating Shrimp, and 5 Emerald Corys.
36 gal bowfront freshwater (temporary, i sprung a leak in my 55!)- 2 Oscars, 1 Electric Blue Lobster (Crayfish), and a Striped Raphael Catfish.
46 gal bowfront freshwater - 2 Opaline and 2 Gold Gouramis, 3 Pink Kissing Gouramis, 3 Golden Dojo Loaches (Weather Loaches), 3 Assorted Angelfish, and a Farlowella.
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post #24 of 31 Old 01-26-2010, 08:02 PM Thread Starter
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Well mine are gonna stay in the 2g for some time, see what's gonna happen with these eggs...If not I"ll need to sit my Cory man down and we'll have a talk about this.

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post #25 of 31 Old 01-26-2010, 09:09 PM
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The eggs should hatch in 3+ days after spawning. Dr. David Sands recommends placing the fry in a breeding net in the main tank, but an individual rearing tank is another method. He notes, as has been previously mentioned in this thread, that it is risky to leave the eggs in with the parents because they will normally readily devour them. B.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #26 of 31 Old 01-26-2010, 09:25 PM Thread Starter
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Oh there's NO WAY they'd have survived in the 55g with the Tigers. I could see on the glass where there must have been well around 30-40eggs at night and I got like SIX out the next AM.

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post #27 of 31 Old 01-28-2010, 09:07 PM Thread Starter
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Well 4 days later, no one hatched and the eggs tonight are covered in what I can only describe as cotton; so I'm assuming fungus.....soooo that didn't work

Does any one know how often/ what regularity Corys lay eggs?

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post #28 of 31 Old 01-28-2010, 09:24 PM
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From what I've heard from people who breed them, cory eggs are so prone to fungus that they always dose an antifungal such as methylene blue as a preventative. I've never done it myself, though.

My cories would lay eggs pretty often. I'd say just about every water change (so once a week) I'd get a couple of eggs here and there. I'd get bigger batches roughly every three weeks or so.

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post #29 of 31 Old 01-28-2010, 11:19 PM Thread Starter
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Well another storm is to hit us tonight (ice storm) so maybe I'll see some new eggs in the AM.

I'll have to look & check...but isn't methylene blue the same then in Ick meds???

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post #30 of 31 Old 01-29-2010, 03:28 AM
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In some ich meds, yes. It works for both, apparently, though I've never treated ich with anything other than the standard heat+salt or in some cases, QuICK Cure, which uses formalin and malachite green.

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