PEPPERMINT DEATHS

anyone got any clues on this.
i had some massive breeding occur after a long hiatus in my usually very productive peppermint bn tank. i collected 127 eggs from 2 batches, one was 103, mustv'e been some kind of record. all of them hatched, 125 of them died with no trace, my water is perfect, very high flow rate, temp around 29degrees, bigger than necessary sump, high turnover, high aeration, ph constant 6.8, kh low but stable, gh 3-4. i'm thinking maybe the high water flow damaged them or something, but it did not affect the lf bn that were raised in the same manner. the mesh keeper net i used to tumble them is possibly overstocked but like i said there is a high water flow thru it.

Maybe a combination of things as you said try lower the temp if you can or add an extra air stone underneath

air definately is not the problem, unless it was too much air and it knocked the kiddies around, i think they lasted 2 days after hatching. could have been temp hey.

is the heater on or is it real hot were you are?

I HAVE A SPLIT SYSTEM AC that controls the temp constantly for me.

Wow, only two days? They wouldn't have even lost the eggs sacks by then would they?
So its not a diet problem as they weren't eating yet.

Wondering if they copped some sort of a bacterial infection or even fungus from being cooped up all together?

Were they all formed perfectly? Like no lack of spines, underdeveloped fins etc which can be a low calcium concentration in the water?

Hi Mick, I run my Pepps and Bn At 25-26 c and don't have losses.
And I've had several cluthes of albino eggs in a home made tumbler at the same time with absolute minimal losses. ( ATM I've got about 350 in a fry saver).
I think it all comes down to the water flow not being too strong or too weak.