I am inclined to believe that a certain % of death toll is indeed natural.
But why is it always with the L66 species, and for example not with the L46. These are in the same tank rac and the same water in my setup. No specific death toll there...
Have other L66 breeders the same % of scrap each time ...

ok, i dont have a problem looking at it that way. i am verry lucky to be able to breed and enjoy the hobby at all. It is the question for me, what is the structural problem behind it? why is a reoccuring event? i want to learn.

:(( :-??
Since my last post, have treated my tank setup with The FMC medicine.
Done it four times with interval of four days.
After this i had two nests of L66 in a row.
But the problem persists. Each nest has a few dead (5-10pc), each time al goes wel until they start feeding on their own, then a ...

Had no more dead young fish sinds last post. Question, how do i go about next time that i got eggs? What is the best way of working?

just one observation i did make, that rased a question...
There are two small containers in the parrent tank, they both get water from the parrent tank by airlift. Both contain one nest of young fish, who differ two weeks in age. The oldest one had a period of fisch dying and is now ok, and now the ...

There was indeed contamination in the thank, some of the guppy's that i have just to populate the mid layer of the thank had white spots on them. Because the adult L numbers look just fine i never made the link to the dying young. I have started treathment. Looking forward to my nest batch of eggs ...

The fish are in the same tank as the parents, but in a seperate container, with an actif flow of water from the parent tank. I feed the parent various , frosen food liken mysis and bloodworm as algea waffels and divers granulate.
Some aditional info to clearly outline the problem, while I wait for ...

i own a pretty good microscoop, i wil do some investigation.
The symptomes at the end always looked like swolen abdomen, that is the reason i tought it was related to the feeding. i could be verry wrong

Hi all, some wise advise and help needed.
The first week after hatching i am facing a high mortality rate under the juvenile fish L66.
It almost looks like they have problems making the transition of feeding of the youlk sack to
feeding on there own digestion. I feed them verry fine artemia ...

Dear forum, How long are the periods between breeding with hypancictrus sp. like L46, L66.
I mean, if they finished after a few times breeding, there is a longer period of rest. How long is this?
six months? a year? What is the best way to trigger spawning again, to set in a new breeding period ...

The Fish in the photo, was a few months old.
It was indeed having the coloration, some weeks in advance. And yes it reminded me also of the yolk sack. But this fish was already outgrown the yolksack For months before the Yelow yolkish bellow appeard. First i Tought it looked like swollen liver.To ...

no, DOA

let it be clear that i am not going to use antibiotics in my tank rack. But i came up on the issue antibiotics via advise of a vet. just to use it for saving a sick indivdual in a quarantaine tank.

Done nothing, because the other fish look healty at this time. I tought the sollution would do more damage than the problem.
With the fish on the photo i went to the Vetrenarian, not his speciality fish. He recomended , that if i would us an antibioticum. i should use Enrofloxacin (Baytril®), found ...

For this moment no other Fish have gone sick. Keep my fingers crossed. So hard to pinpoint what the reason of these cases where.

all th other fish are indeed wel nurisched.
the decade most have hapend over a few days.
never seen that this fish was skinny before it went sick.

Makes sense. The UV is only via a bypas so only a therd of the water passes tru it. But never the less. The ozon is only on if there are problems. The lack of substrate could indeed mean something. But i suck of the waste dayly. And the juvs are already a few months old, en i previously lost a young ...

Dear forum visitors, first greetings to you all.
I present you another question?
First briefly outline what is at stake.
I have a breeding position with three tanks of one meter.
There is a biological filter under of also one meter, is also a trickle filter and filter werverbed.
a UV lamp and ...

actions taken by me :

made a DIY extra Trickle filter and a moving bed filter on the tank rack.
Also installed a UV light in the filter cirquit.
Made an automated system with an magnetic valve , for auto change partial of the water dayly.
And myself , forced to have extra hygiene in the tanks ...

just euthanised the lot a few days a go.
there wil be others

just an idea that came to mind.
Could it be that the larvea, the jong frey, since it is so fragile...
being nurced by an overprotective male. and being so delicate, he presses to hard on them while protecting.and creates damaged fins on the fry.
Or does this happens also if eggs are raissed ...

using cupper , maybe its not so good, i know.
But dont think using plastic on the rack is helpfull if the rest of the house installation is made of cupper. if the water in the pipes dont stay for ages in the pipes, there is no problem.

i also have a nest of 7 L46 , few weeks old.
one of those ...

done the test again, tought i made an error reading the strips.
but same result. strange indeed. there should be nothing in the cirquit that
can effect this. Something to look in to. suggestions?

some more info to keep the discusion going

The values in the tankrack are : NO3= 25, NO2= 0, GH= >14, KH = 10, Ph= 6.8
Tapwater values: NO3= 0, NO2= 0, GH= >7, KH = 15, Ph= 6.4
i use tap water to do partial refil.
this happens almost every day. May tankrack settup is done this way.
Ik can suck out ...

But what is the advantage of botom substrate against avoiding bacterial infection on fry? I tought a naked tank would be easyer to keep clean.

I wil start to spend even more attenion on hygiene, but my tanks are already clean do. hope it helps to prevent problems next time. Because the alpha male ...

thanks for the quick resons.
I dont take special messures against bacteria, when i have eggs or fry.
Just regular suck of the dirt att the bottom of the tank. i dont use any substrat on the bottom. i do regular partal water changes. I have a UV set , but not in use on my breedingrack. should i use ...

This is for the second time that i have a nest jong hypancistrus with lots of individuals who have damaged pectoral fins. The first time it hapend with other L46 and now L66. The where all left in the cave with daddy. And the L46 had a smaler cave than the L66.
They reside in breeding rack of 3 ...