Help! My cories spawned! What do I do??

itiwhetu said:

The reason egg is so good is that you know the fry are eating. Any live food as first food, like green water is very hard to determine the quality and quantity of what is the water unless you have a microscope on hand.I have looked at green water through a microscope and the conclusion was it is inconsistent at best. Sometimes when you are trying to be natural you have to know when to change direction for the benifit of the fish

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NCaquatics said:

Re: water changes with fry

Use a white clean bucket. Any fry siphoned up you can simply net out and place back into the breeding container.
View attachment 119473

To vacuum, use a pipette or small airline hose siphon to clean the debris very carefully around the fry
View attachment 119474

Click to expand...

itiwhetu said:

We will start with the tank, your tank has a base I think of 15"x15". Traditionally breeding tanks are made long, They are Twice as long as they are high and deep ( eg 24"x12"x12" ) The reason for this is to give the fish room to run. I would never put Corydoras into something smaller than this tank 15 gallons. The shape is important. You have managed to get these guys to spawn, great and we can work with what you have got. Because of the shape and the fact that everybody is on top of each other, the parents have to come out. The baby guppies can stay there they are fine.
I would normally move gavel away from one end or the front of the tank by about 3 inches this gives a section of bare bottom. Important for cleaning and observation. Any food you put into the tank is a suspension it will fall to the base of the tank and will end up at the lowest point, the bare base of the tank. The rest of the base doesn't need to be disturbed, just syphon from the bare base you will see material draft down as you syphon. Only do your normal water changes, make sure you rinse the sponge filters, don't have the filters running to hard.
Feeding egg yoke has been described elsewhere. But use some cotton an old singlet or any cotton you have experiment with different material. The idea is that for new fry the particle size of the egg yoke should be so small you can't see it with the naked eye. The suspension in the tank should look like milk. It only takes a tiny bit of egg to achieve this. That suspension will dissipate into the tank the young fish will pick up those tiny particles. I only ever feed twice a day. Morning and night.
I have said it is possible to leave the parents in the tank. I have done this with a tank 48"x18"x18'' The tank was heavily planted at one end. Once the fish stopped spawning you feed them. The next morning they spawn again and you feed them once the fry hatch they migrate into the gravel bed where they are largely safe, feed egg yoke which drifts to all parts of the tank the fry get food. I have explained why egg yoke feed this way is so good, remember this is first food, I would feed this for one to two weeks depending on the setup and number of fish. Ask more questions if you like or don't understand what I have written.

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EllRog said:

Egg yolk contains fats and cholesterol which can damage a fish, it will almost certainly cause swim bladder problems if used exclusively for feeding and can lead to underdeveloped organs. The fish cannot properly digest it's proteins. Infusoria is the best food for fry for the first 1-2 weeks as they can hunt it around the tank with ease providing the water level is low enough for the fry to easily find it, then moving on to foods such as microworms and baby brine shrimp onwards. The fry will instinctively eat what they find with no problem, managing growth is more down to the regular water changes, diluting the growth hormones that the larger fry produce to stunt the growth of smaller fry.

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itiwhetu said:

Just wondering where the information about fats and cholesterol damaging fish came from. I would like to read the article and also the one about swim bladder problems and underdeveloped orgins. Could you please post the references

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EllRog said:

Is it worth it or will you just argue that too? Have a Google, I won't engage further as you haven't listened to others and force your opinion as fact. Nothing personal, just not going to debate with you

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itiwhetu said:

I take it from that your statement about egg yoke is your own personal opinion, which is great we are all allowed those.

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NCaquatics said:

Re: water changes with fry

Use a white clean bucket. Any fry siphoned up you can simply net out and place back into the breeding container.
View attachment 119473

To vacuum, use a pipette or small airline hose siphon to clean the debris very carefully around the fry
View attachment 119474

Click to expand...

itiwhetu said:

I take it from that your statement about egg yoke is your own personal opinion, which is great we are all allowed those.

Click to expand...

itiwhetu said:

We will start with the tank, your tank has a base I think of 15"x15". Traditionally breeding tanks are made long, They are Twice as long as they are high and deep ( eg 24"x12"x12" ) The reason for this is to give the fish room to run. I would never put Corydoras into something smaller than this tank 15 gallons. The shape is important. You have managed to get these guys to spawn, great and we can work with what you have got. Because of the shape and the fact that everybody is on top of each other, the parents have to come out. The baby guppies can stay there they are fine.
I would normally move gavel away from one end or the front of the tank by about 3 inches this gives a section of bare bottom. Important for cleaning and observation. Any food you put into the tank is a suspension it will fall to the base of the tank and will end up at the lowest point, the bare base of the tank. The rest of the base doesn't need to be disturbed, just syphon from the bare base you will see material draft down as you syphon. Only do your normal water changes, make sure you rinse the sponge filters, don't have the filters running to hard.
Feeding egg yoke has been described elsewhere. But use some cotton an old singlet or any cotton you have experiment with different material. The idea is that for new fry the particle size of the egg yoke should be so small you can't see it with the naked eye. The suspension in the tank should look like milk. It only takes a tiny bit of egg to achieve this. That suspension will dissipate into the tank the young fish will pick up those tiny particles. I only ever feed twice a day. Morning and night.
I have said it is possible to leave the parents in the tank. I have done this with a tank 48"x18"x18'' The tank was heavily planted at one end. Once the fish stopped spawning you feed them. The next morning they spawn again and you feed them once the fry hatch they migrate into the gravel bed where they are largely safe, feed egg yoke which drifts to all parts of the tank the fry get food. I have explained why egg yoke feed this way is so good, remember this is first food, I would feed this for one to two weeks depending on the setup and number of fish. Ask more questions if you like or don't understand what I have written.

Click to expand...

itiwhetu said:

We will start with the tank, your tank has a base I think of 15"x15". Traditionally breeding tanks are made long, They are Twice as long as they are high and deep ( eg 24"x12"x12" ) The reason for this is to give the fish room to run. I would never put Corydoras into something smaller than this tank 15 gallons. The shape is important. You have managed to get these guys to spawn, great and we can work with what you have got. Because of the shape and the fact that everybody is on top of each other, the parents have to come out. The baby guppies can stay there they are fine.
I would normally move gavel away from one end or the front of the tank by about 3 inches this gives a section of bare bottom. Important for cleaning and observation. Any food you put into the tank is a suspension it will fall to the base of the tank and will end up at the lowest point, the bare base of the tank. The rest of the base doesn't need to be disturbed, just syphon from the bare base you will see material draft down as you syphon. Only do your normal water changes, make sure you rinse the sponge filters, don't have the filters running to hard.
Feeding egg yoke has been described elsewhere. But use some cotton an old singlet or any cotton you have experiment with different material. The idea is that for new fry the particle size of the egg yoke should be so small you can't see it with the naked eye. The suspension in the tank should look like milk. It only takes a tiny bit of egg to achieve this. That suspension will dissipate into the tank the young fish will pick up those tiny particles. I only ever feed twice a day. Morning and night.
I have said it is possible to leave the parents in the tank. I have done this with a tank 48"x18"x18'' The tank was heavily planted at one end. Once the fish stopped spawning you feed them. The next morning they spawn again and you feed them once the fry hatch they migrate into the gravel bed where they are largely safe, feed egg yoke which drifts to all parts of the tank the fry get food. I have explained why egg yoke feed this way is so good, remember this is first food, I would feed this for one to two weeks depending on the setup and number of fish. Ask more questions if you like or don't understand what I have written.

Click to expand...