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View Full Version : How do you keep fry living more than a week ?



mey123
07-19-2007, 01:04 AM
this is my third try and newly hatched fry are dying after only 3 days. have lost 50%. last time lasted a week and all died overnight. any and all help is appreciated.

Noahsnana
07-19-2007, 04:55 AM
What are you doing for water quality?

Alitheoldbat
07-19-2007, 05:00 AM
You need to tell us what condtions your previous attempts were. Where did you have them? What is/was water temp? Did you have airstone or other source of air for them? Did you do water changes? If yes how often? And those in the know will want to know your PH, nitrates, nitrites, etc.

Should have lots of help when folks get up again. :)

Graham
07-19-2007, 08:08 AM
Also what are you feeding them...once that egg sac is gone they need food

PapaBear
07-19-2007, 08:20 AM
Those are the questions. It isn't so much "what do you do to keep them alive?" as it is "what are you doing now to kill them?" Both are pretty easy to do with minimal effort.

mey123
07-19-2007, 12:02 PM
you guys are great! thanks for the fast replies. set up a 150 gallon pool. filled with pond water and put hyacinths and spawning brushes with eggs on sat. provided two air pumps with stones. hatch was mon thru wed. several hundred hatched. did a 25% water change wed. started using liquid fry sun. started using deans premium baby tropical fish food wed. some still had egg sacs left on wed. wed night approx. 50% were already dead. havent checked water quality. i was ASSuming since it came from the pond 4 days earlier it would be similar quality. do condtions change that fast. thank you all for your help. one day, with your assistance i may get it right.

cindy
07-19-2007, 01:41 PM
shade? water temp?

Fishbreeder
07-20-2007, 08:24 AM
3 days is about the right time for the "dwindles" to hit a tank of fry.

Although it is certainly possible to rear fry totally in captivity, they require some living food early in thier life to set thier guts to working right. By three days they are very much in need of nutrition. Artificial diets might keep them alive for that long, but that is also when we at the hatchery remove the fry from the hatchery to plankton ponds.

Next time you get a hatch, set up a second tank to raise them some food. Aquarium people call it "infusoria" and they will have many recipes for brewing it.

One recipe I know of that works pretty good.....

In a 100 gallon container that has some aeration and dechlorinated water add the following...

One quart of hard boiled iceberg lettuce and the "juice" it was boiled in.

One good armful of fresh hay or a gallon or so of dried grass clippings.

One quart of "live" water from a watergarden pool, standing water in a ditch, or if nothing else, water from the fish pond.

What you're shooting for here is rotifers, glass worms, and other very small plankters that are not easily seen with the naked eye. If you see stuff easily that is swimming around like little "bugs" you either got Daphne or Cyclops, both too big for the fry to eat, and big enough to eat the fry. These are good foods for two week old fry.

Usually the rotifers will come along in about three or four days.

Siphon some of the water from the rotifer tank to the fry tank about four or five times a day. Two or three days of this is enough then switch to artificial diet.

Timing is everything. So...

At 24 hours post hatch you will need to begin feeding the fry. You can use a mixture of hard boiled egg yolk and weight lifter's protein supplement at day one. Blend the materials then filter tham through a fine cloth or other fine material to remove the "chunks". Feed a small amount four to six times a day for the next two days. On day three switch to the rotifer soup. On day five start using the commercial "egg layer fry diet".

If so inclined, I've found that the 50 micron shrimp starter you buy from a place like AES works better than anything I;ve gotten from the pet shop.

At two weeks you can switch to ground up aquarium flakes.

All this time you must watch ammonia in the fry tank, if it elevates at all it will kill the fry. These rich soups will elevate the ammonia, so you will need to either filter tha tank or change the water regularly.

To filter the tank and not remove the fry use a couple of sponge filters. Best if they've been running in some tank water for about two weeks before you need them in your fry tank.

Hope this helps, have fun with your babies.

Brett

Luck
07-20-2007, 03:51 PM
3 days is about the right time for the "dwindles" to hit a tank of fry.

Although it is certainly possible to rear fry totally in captivity, they require some living food early in thier life to set thier guts to working right. By three days they are very much in need of nutrition. Artificial diets might keep them alive for that long, but that is also when we at the hatchery remove the fry from the hatchery to plankton ponds.

Next time you get a hatch, set up a second tank to raise them some food. Aquarium people call it "infusoria" and they will have many recipes for brewing it.

One recipe I know of that works pretty good.....

In a 100 gallon container that has some aeration and dechlorinated water add the following...

One quart of hard boiled iceberg lettuce and the "juice" it was boiled in.

One good armful of fresh hay or a gallon or so of dried grass clippings.

One quart of "live" water from a watergarden pool, standing water in a ditch, or if nothing else, water from the fish pond.

What you're shooting for here is rotifers, glass worms, and other very small plankters that are not easily seen with the naked eye. If you see stuff easily that is swimming around like little "bugs" you either got Daphne or Cyclops, both too big for the fry to eat, and big enough to eat the fry. These are good foods for two week old fry.

Usually the rotifers will come along in about three or four days.

Siphon some of the water from the rotifer tank to the fry tank about four or five times a day. Two or three days of this is enough then switch to artificial diet.

Timing is everything. So...

At 24 hours post hatch you will need to begin feeding the fry. You can use a mixture of hard boiled egg yolk and weight lifter's protein supplement at day one. Blend the materials then filter tham through a fine cloth or other fine material to remove the "chunks". Feed a small amount four to six times a day for the next two days. On day three switch to the rotifer soup. On day five start using the commercial "egg layer fry diet".

If so inclined, I've found that the 50 micron shrimp starter you buy from a place like AES works better than anything I;ve gotten from the pet shop.

At two weeks you can switch to ground up aquarium flakes.

All this time you must watch ammonia in the fry tank, if it elevates at all it will kill the fry. These rich soups will elevate the ammonia, so you will need to either filter tha tank or change the water regularly.

To filter the tank and not remove the fry use a couple of sponge filters. Best if they've been running in some tank water for about two weeks before you need them in your fry tank.

Hope this helps, have fun with your babies.

Brett

Can this be made into a sticky for this forum, then some "in the know" peeps can add to it?

Noahsnana
07-20-2007, 04:27 PM
Can this be made into a sticky for this forum, then some "in the know" peeps can add to it?
Done
Stickied in A Breeders and put in Library - Koi Husbandry

Luck
07-20-2007, 04:58 PM
Done
Stickied in A Breeders and put in Library - Koi Husbandry

Thanx! You are:first: :cool:

Noahsnana
07-20-2007, 05:43 PM
:humble: :humble:

dad777steelers
05-01-2008, 09:14 AM
3 days is about the right time for the "dwindles" to hit a tank of fry.

Although it is certainly possible to rear fry totally in captivity, they require some living food early in thier life to set thier guts to working right. By three days they are very much in need of nutrition. Artificial diets might keep them alive for that long, but that is also when we at the hatchery remove the fry from the hatchery to plankton ponds.

Next time you get a hatch, set up a second tank to raise them some food. Aquarium people call it "infusoria" and they will have many recipes for brewing it.

One recipe I know of that works pretty good.....

In a 100 gallon container that has some aeration and dechlorinated water add the following...

One quart of hard boiled iceberg lettuce and the "juice" it was boiled in.

One good armful of fresh hay or a gallon or so of dried grass clippings.

One quart of "live" water from a watergarden pool, standing water in a ditch, or if nothing else, water from the fish pond.

What you're shooting for here is rotifers, glass worms, and other very small plankters that are not easily seen with the naked eye. If you see stuff easily that is swimming around like little "bugs" you either got Daphne or Cyclops, both too big for the fry to eat, and big enough to eat the fry. These are good foods for two week old fry.

Usually the rotifers will come along in about three or four days.

Siphon some of the water from the rotifer tank to the fry tank about four or five times a day. Two or three days of this is enough then switch to artificial diet.

Timing is everything. So...

At 24 hours post hatch you will need to begin feeding the fry. You can use a mixture of hard boiled egg yolk and weight lifter's protein supplement at day one. Blend the materials then filter tham through a fine cloth or other fine material to remove the "chunks". Feed a small amount four to six times a day for the next two days. On day three switch to the rotifer soup. On day five start using the commercial "egg layer fry diet".

If so inclined, I've found that the 50 micron shrimp starter you buy from a place like AES works better than anything I;ve gotten from the pet shop.

At two weeks you can switch to ground up aquarium flakes.

All this time you must watch ammonia in the fry tank, if it elevates at all it will kill the fry. These rich soups will elevate the ammonia, so you will need to either filter tha tank or change the water regularly.

To filter the tank and not remove the fry use a couple of sponge filters. Best if they've been running in some tank water for about two weeks before you need them in your fry tank.

Hope this helps, have fun with your babies.

Brett

Hey I was wondering do you think I could substatute barley straw for the hay?thanks..

dad777steelers
05-01-2008, 05:18 PM
Hello I have a couple of questions concerning your rotifers mix,and the 1st egg food mix.I was wondering wich type of weight lifters protein suplimant;I went searching for some,and found a hundred different types,and flavors.I also was wondering if I could substitute barley straw for the hay?Thanks

Toragoi
05-05-2008, 05:36 PM
"...One good armful of fresh hay or a gallon or so of dried grass clippings."

Brett


By fresh do you mean freshly cured or freshly cut, Brett? I figure you mean freshly cured (like the dried grass clippings), but since we're cooking fresh lettuce here, there is a slight but reasonable doubt. Also, do you mean grass hay or would alfalfa, oat and grain, or timothy hays be an option?