Hello Mummymonkey! I have the same problem with dead fry. Here it's about 25%. I'm feeding fresh breed artemia. I don't know the reason, but normally it stops one day and the rest than is not a problem. I've tried with sand, without sand, different tanks and so on and so on. I've found no reason. I ...

I've got every time about 90% fertile eggs (except one time, where every egg was infertile). In the first 3 weeks i've lost every time about 25% of the young c121. But it was enough to get up now about 100 young C121

Joachim

Hello!

Congratulations!
The time in year they are spawning is very interesting, in my tank they started november last year an finished in march.
I've made the same experience with the water chemistry. It seems that they need soft water for spawning.

Greets,
Joachim

Hello! I'm breeding C121, too. More than one year they did nothing, but in novembre last year they started and are not stopping up to now. Every one or two weeks they're producing eggs. Up to now i think i have about 80 young C121. 50% of the eggs are infertile. For water chemistry i do not agree ...