L134 and L471 fry emerging dead

[Evie007]

Hii I've been having problems with my L134s and L471s
I've lost around 20-40 batches of eggs to this problem

Breeding is fine every 1-2 ish weeks depending

But the fry don't survive
Hatch / emerged dead

Water Conditions with RO
Temp 27,5
Ph 7,4 ish
Tds 100-150
Ammonia 0
Nitrites 0
Nitrates 20-40 depending on water change days ( working on making this better )
Gh 7
Kh 3


Tap water is
Ph 8
Tds 220-400 ish
Ammonia 0
Nitrates 0
Nitrites 0
Gh 21 ish
Kh 11 ish

[bekateen]

Hi Evie007,

Sorry to read this... that sucks.

I'm not sure what to recommend. The eggs shouldn't be "old" (something I've gotten from females which haven't spawned in a long time). So I'm thinking oxygen. Try adding more aeration to the tank. Or, if you're incubating the eggs separately, increase water flow or air flow.

Good luck,
Eric

[TwoTankAmin]

This reminds me of a situation with which I was familiar from a number of years ago. A gent in Texas was breeding zebras and the fry were dying. Nothing he tried helped. He was a friend of Barbie F. who is a mod. here. I knew her from my very first fish forum in 2002. She got me into breeding zebras.

She had the gent in Texas send here some of the fry. She had a connection at a local university who was able to determine what was the problem. it turned out to be velvet:

Velvet disease, also known as gold dust disease or rust disease, is a parasitic infection that affects both freshwater and saltwater fish. It is caused by a microscopic parasite called Oodinium (in freshwater) or Amyloodinium (in saltwater)

In theory, what kills ich should work on velvet. But this is not 100% the case. What Barbie told the zebra breeder to use was "Proform C (which is sold as a pond medication) as one of the more effective treatments." He did and that solved the problem.

The issue before the situation was that the breeder was not able to see the velvet on the tiny fry. Apparently it was not an issue for the adult fish. I do not it is the same for velvet, but a fish which gets ich and survives it develops an immunity against it. This is not a permanent immunity but it does last for some time. This is why in some cases of a tank infected with ich, some fish do not get it. It has also led to research being done to come up with a vaccine for Ich.

Please understand I am not saying this is for certain your problem. In fact it could not be the answer at all. But, I felt it was worth mentioning JIK since it was so similar to you situation.

[bekateen]

This reminds me of a situation with which I was familiar from a number of years ago. A gent in Texas was breeding zebras and the fry were dying. Nothing he tried helped. He was a friend of Barbie F. who is a mod. here. I knew her from my very first fish forum in 2002. She got me into breeding zebras.

She had the gent in Texas send here some of the fry. She had a connection at a local university who was able to determine what was the problem. it turned out to be velvet:

Velvet disease, also known as gold dust disease or rust disease, is a parasitic infection that affects both freshwater and saltwater fish. It is caused by a microscopic parasite called Oodinium (in freshwater) or Amyloodinium (in saltwater)

In theory, what kills ich should work on velvet. But this is not 100% the case. What Barbie told the zebra breeder to use was "Proform C (which is sold as a pond medication) as one of the more effective treatments." He did and that solved the problem.

The issue before the situation was that the breeder was not able to see the velvet on the tiny fry. Apparently it was not an issue for the adult fish. I do not it is the same for velvet, but a fish which gets ich and survives it develops an immunity against it. This is not a permanent immunity but it does last for some time. This is why in some cases of a tank infected with ich, some fish do not get it. It has also led to research being done to come up with a vaccine for Ich.

Please understand I am not saying this is for certain your problem. In fact it could not be the answer at all. But, I felt it was worth mentioning JIK since it was so similar to you situation.

Good advice TTA.

Cheers, Eric