Black Death

[bodyshop20]

I have kept fish for over 15 yrs and breed many species with good success.
I dont normally keep mollies but my girlfriend loves them so i helped her to set up a breeding pair.
She got to batches of about 30 fry, But both batches died 1 after the other and i cant explain it.
I even caught a few guppies and put 60 of their fry in with mollies and they all lived
Baffled for once

 

[Colin_T]

we could do with a bit more detailed information if possible.
How long after they were born did they die?
Did they all die at once or over the course of a week, month, year?
Where were they kept after they were born?
Did you scoop them up with a net to move them?
What where they fed and how often?
Was their tank filtered and did it get water changes? If so how was it filtered and how often were the water changes done?
WHat was the water quality and parameters like, ie: temp, PH, ammonia, GH & KH?