Egg Fiasco - Any Advice Appreciated!

JessicaHeather

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Hi

I've been keeping fish for a while now, amongst which are 4 Albino Corys which I inherited from someone. Upon recent investigation (I have had the fish almost a year) I discovered that my group was more than likely 2 m & 2 f - two of them are much bigger which I had previously assumed was just greediness!

So I thought I might try my hand at this breeding lark. We have a 3' tank which is set up and running as a hospital/quarantine tank, but luckily we have not had to use it and havent had any new fish for a long while. I moved the group into this tank, with a bare bottom, an airstone and a Fluval3 filter (I know this would suck up fry, but bear with me!)

I fed the group on a variety of flakes, pellets, frozen bloodworm & frozen brineshrimp, and did cooler water changes every few days. After about 3 days I got up one morning (about 6am) and found them at it. Observed the T-position, then my female would scatter them on the bottom of the filter (which was at an angle) and go rest, then start over again. She finally finished, after spreading a few on the glass nearby, and dropping a few onto the floor. Most were on the filter. I left the group a while, but they soon started picking the eggs off and eating them, so I moved them back into my main community tank.

Since the eggs were on the filter I couldnt remove it so just decided that on day 3 I would turn it off. I rearranged the airstone so that it was underneath the bulk of the eggs. I added Methylene Blue as per the instructions on the bottle (day 1 still) and suggestions around the web. For 3 days the eggs looked good. Some were clear with developing dots, and some seemed to have white splodges in (which I was led to understand from various online articles meant they were infertile). I didnt remove these for a couple of reasons. The first being that as they are albino the eyes are pink, so surely developing albino eggs would be pale...? and second the eggs were all very close together and removing one without another would have been very difficult.

After 3 days, I switched my filter off. However my water was still dark blue, and apart from things I have read on the net about meth blue disfiguring fry, the lady in my lfs said it should pale itself, which it hadnt. Therefore I did a water change of about 30%. This may have been very stupid. None of the eggs broke the surface and the water I put in was treated with tap safe and was the same temp.

However, the next morning I got up and all the eggs had grown a kind of fine white hair looking thing. After another day of wishful waiting I decided the eggs were gonners and got rid.

Where did I go wrong with these? Any pointers would be good.

Jessica
 
Hi

I've been keeping fish for a while now, amongst which are 4 Albino Corys which I inherited from someone. Upon recent investigation (I have had the fish almost a year) I discovered that my group was more than likely 2 m & 2 f - two of them are much bigger which I had previously assumed was just greediness!

So I thought I might try my hand at this breeding lark. We have a 3' tank which is set up and running as a hospital/quarantine tank, but luckily we have not had to use it and havent had any new fish for a long while. I moved the group into this tank, with a bare bottom, an airstone and a Fluval3 filter (I know this would suck up fry, but bear with me!)

I fed the group on a variety of flakes, pellets, frozen bloodworm & frozen brineshrimp, and did cooler water changes every few days. After about 3 days I got up one morning (about 6am) and found them at it. Observed the T-position, then my female would scatter them on the bottom of the filter (which was at an angle) and go rest, then start over again. She finally finished, after spreading a few on the glass nearby, and dropping a few onto the floor. Most were on the filter. I left the group a while, but they soon started picking the eggs off and eating them, so I moved them back into my main community tank.

Since the eggs were on the filter I couldnt remove it so just decided that on day 3 I would turn it off. I rearranged the airstone so that it was underneath the bulk of the eggs. I added Methylene Blue as per the instructions on the bottle (day 1 still) and suggestions around the web. For 3 days the eggs looked good. Some were clear with developing dots, and some seemed to have white splodges in (which I was led to understand from various online articles meant they were infertile). I didnt remove these for a couple of reasons. The first being that as they are albino the eyes are pink, so surely developing albino eggs would be pale...? and second the eggs were all very close together and removing one without another would have been very difficult.

After 3 days, I switched my filter off. However my water was still dark blue, and apart from things I have read on the net about meth blue disfiguring fry, the lady in my lfs said it should pale itself, which it hadnt. Therefore I did a water change of about 30%. This may have been very stupid. None of the eggs broke the surface and the water I put in was treated with tap safe and was the same temp.

However, the next morning I got up and all the eggs had grown a kind of fine white hair looking thing. After another day of wishful waiting I decided the eggs were gonners and got rid.

Where did I go wrong with these? Any pointers would be good.

Jessica
I have raised several batches of corydoras successfully.I use a length of air tubing and carefully syphon the eggs into a 2 litre pop bottle with the top cut off.You have to gently scrape as you are syphoning.Then float the bottle in a tank, adding an airstone to the bottle.Once they hatch I tip them into a 5 gallon container and feed on microworm and 100 micron food from ZM.When they get bigger I put them into bigger tanks to grow on. I use sponge filters and when I do a water change I use water from one of my big tanks.
This has worked for me.
 
Hi what sort of cori have you had babies from?

would you sell some eggs/ fry?

thanks
 
Just thought I would update you -

After the failure as above, the tank was emptied, thoroughly cleaned, used as a holding tank while my community was undergoing a change from gravel to sand, and used for various water ageing proccesses, amongst other things.

Yesterday I happened to glance over and noticed a tiny pink baby swimming up and down the tank!! He is about 15mm and really lively, acts just like a miniature adult!

All I can think is that he has been living in the filter all this time and eating from the gravel (this was added from my community tank after the spawning attempt when I thought the tank was empty). I really do not know how he has survived, I have not fed him, there has been untreated tap water put in the tank, unheated, all my adult fish have been in there... The filter is the only thing I can think of as it would have remained wet while the tank was emptied of water.

I dont know when the danger period is over and when i can assume he will survive, but he seems to be happy and lively, which Im taking as a good sign!
 
hi jessicaheather,congrats on finding the fry!!!it could of been hiding in the bottom of the filter or maybe the corys laid eggs in the community tank (& ate them b4 you noticed) & 1 fell into the gravel & got moved to the tank then.think its one of those things youl never know,lol.

as for the danger period for cory fry,i didnt relax about mine til they were 12 weeks old & in with the adults.i lost more fry at weeks 5&6 than any other time for no apparent reason.

anyway,goodluck with the fry.keep us informed of how it all goes!!

shaz :)
 

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