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Leif & Nemo

Fry care and water change - how, when and why

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Hi there,

Just signed in for a membership here at Kokos for the main reason to keep my debut fry alive! I know if I would search for proper advise it should be in here :)

Yesterday evening around 10 o'clock (Danish time, GMT + 2 hours) the eggs hatched successfully. I filled up my 14,3 gallon (54L) tank to half the volume which is 27 liters. I added a thermostat heater fixed at 22 Celsius (71,6 Fahrenheit) plus a low pumping air pump.

Up to the hatching I've done regular water change (twice a day) 50% a time. Of course I can't maintain that level of water change any longer and here are my questions:

How often should I change the water?

How much each time?

And how?

I really hope that they will make it. The male is a Ryukin and the female is a Pearl scale :)

Looking forward to see what you guys have to say.

Ps. I know I would find the answers to my questions somewhere among older threads but going through a lot of threads without finding clear answers I decided to start this topic and sorry for that.

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welcome to kokos, i have no experience with breeding & raising fry, but i wish you all the best. hopefully, some of our members with experience in this department will be along shortly to offer their advice/opinions :)

if you like, you can post a video or a few pics so we can see them & your set up.

pics & vid www.photobucket.com just vid, www.youtube.com just copy the direct link once they've uploaded & post that here in your reply.

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For more info faster you could do a search in the breeding forum.There is a lot of info already posted.

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How many fry do you have?

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For more info faster you could do a search in the breeding forum.There is a lot of info already posted.

I read some few of them thanks...and I´m still researching...phuuuhh. There are quite some I would say. It's my first time breeding and just do not want it to turn into a failure...it will make me sad. Guess I have to be less fussy about it.

Edited by Leif & Nemo

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How many fry do you have?

Sorry for the late reply and thanks for showing interest Ashlee. Had to head home to count meanwhile. It turned out to be rather problematic counting the fry...each time I did a recount the number got higher...so there are 118 or 128 or 137 so guess somewhere in between.

Ps. fellowing your updates and your fry look good...like when they get roundish and yours did at an early stage ;)

Edited by Leif & Nemo

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Oh my gosh hahaha what are you going to do with all of those things?

Ive gotta tell you, I didn't give you any advice because I really don't know what is best.

The first time i had fry I did basically nothing and tons of them survived.

The second time, i followed advice from on here and none of them lived. I'm pretty sure it was just a bad batch and not anyone's fault.

This time, i am just skimming the water off the top with a small bucket and gently replacing it. Small amounts at a time. Be careful not to create too much current while they are still young. I have heard and believe I have seen that it can actually break their backs.

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I also should have asked the size of the container.

With that many fry, you will want to do more frequent water changes. What I used to do when I had a large spawn of angel fry was I would use an airline hose to siphon the water out of the tank. I would then use it to siphon clean water into the tank as well. You do want to be really careful with how gentle you are. Because the force of the water can break their backs. This is also why you don't want to have a filter right now. Just keep the water clean with water changes. Also make sure that the water level is no more than 4 inches. The increased water pressure can cause damage to their developing swim bladder.

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I also should have asked the size of the container.

With that many fry, you will want to do more frequent water changes. What I used to do when I had a large spawn of angel fry was I would use an airline hose to siphon the water out of the tank. I would then use it to siphon clean water into the tank as well. You do want to be really careful with how gentle you are. Because the force of the water can break their backs. This is also why you don't want to have a filter right now. Just keep the water clean with water changes. Also make sure that the water level is no more than 4 inches. The increased water pressure can cause damage to their developing swim bladder.

Hi Ashlee, thanks for your advice.

The fry are in my 14,3 gallon (54L) tank, the water level now lowered from 15 to 12 cm (4,7 inches). I did wc yesterday evening (10%) and I'm planning the to siphon the same amount this evening. Is that sufficient do you think? Bought a turkey baster yesterday and sucked dirt up with it. They are pooping and it's definitely without feeding?!

An hour ago I gave them 4 baby shrimp :) only two of the fry began nipping to the food. It is their third day.

How long are they able to stay unfed?

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Oh my gosh hahaha what are you going to do with all of those things?

Ive gotta tell you, I didn't give you any advice because I really don't know what is best.

The first time i had fry I did basically nothing and tons of them survived.

The second time, i followed advice from on here and none of them lived. I'm pretty sure it was just a bad batch and not anyone's fault.

This time, i am just skimming the water off the top with a small bucket and gently replacing it. Small amounts at a time. Be careful not to create too much current while they are still young. I have heard and believe I have seen that it can actually break their backs.

Hi there,

Thank you for your advice to give no advice :) I just have low expectations to my own intuition in this regard. During my first effort to siphon water with a pump line tube I was quite certain that no fry went through to the bucket I had for waste water and just as I was about to pure the water out I saw four fry babies, two of them was still swimming and to looked certainly as if they've had their back broken... Instead of looking strait like the letter "I" they had a capital letter "L" shape. Well thanks God I somewhere in here people use a spoon to transport fry with so I rescued the still swimming babies back to the tank. So I guess I better stick to others advice.

Concerning my later plans for the fry, I simply don't believe that I'm gonna end up with 100 nor 50 nor 20... I think I'm gonna kill them all in one of my siphon efforts. Let's wait and see!

Is there a crucial period of their survival? What is the most crucial period of their growth to adulthood?

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I also should have asked the size of the container.

With that many fry, you will want to do more frequent water changes. What I used to do when I had a large spawn of angel fry was I would use an airline hose to siphon the water out of the tank. I would then use it to siphon clean water into the tank as well. You do want to be really careful with how gentle you are. Because the force of the water can break their backs. This is also why you don't want to have a filter right now. Just keep the water clean with water changes. Also make sure that the water level is no more than 4 inches. The increased water pressure can cause damage to their developing swim bladder.

Hi Ashlee, thanks for your advice.

The fry are in my 14,3 gallon (54L) tank, the water level now lowered from 15 to 12 cm (4,7 inches). I did wc yesterday evening (10%) and I'm planning the to siphon the same amount this evening. Is that sufficient do you think? Bought a turkey baster yesterday and sucked dirt up with it. They are pooping and it's definitely without feeding?!

An hour ago I gave them 4 baby shrimp :) only two of the fry began nipping to the food. It is their third day.

How long are they able to stay unfed?

Excuse me for the question but what does "angel fry" refers to? I just got curious.

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Welcome to the forum :hi Good luck with your fry. I can offer no experience or advice, sorry.

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Welcome to the forum :hi Good luck with your fry. I can offer no experience or advice, sorry.

Thanks, Flipper! The fry look good and they are growing :)

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