Keep wiping my spawns off with bbs and I don't know what I'm doing wrong. On Baker's page, he says that he suspects the empty shells causing all the problems, but the latest batch was decap. More, I had Swordtail fry that had no problem eating the same bbs (and not crapping out on me and die). Baker again - says a full belied fry will ignore any bbs under his nose - that would kinda strike overfeeding from my list - so I'm left with nothing..

are you sure its the food?
Can you describe your breeding setup for us?
How much you are feeding and how you are feeding it?
I use dry decap bbs for my betta fry, and I now have a spawn of 93 thats over a month old now, and another two spawns 12 total that are getting up towards breeding age they love it, I also supplement every now and again with different kinds of flake, frozen bbs, I squeeze the juice out of tubifex worm blocks for them, and the most important thing when breeding IMO is the use of live plants, they carry small crustaceans thats are smaller than bbs that the fry will hunt down, this helps them from starving to death if they don't immediately take to the dry food, and it will also save the babies too small to feed on bbs quite yet..

I use floating waterprite, they adore it, and the plants I put in there are never in in better condition

10 gal with various water levels (bit higher after each WC), heater, no filter, WC pretty much daily (mostly for bottom yuk), some snails (and snail poop). Everything is fine with liquifry one or two days, then mw and ve. Different now is that I use one IAL and I'm decapping and hatching the amount that can stick on a wet q-tip and baking soda instead of salt (maybe I'll have more luck with that..)
Even so, the last hatching batch went to the community tank (no nerve to feed the fry :) )

I hatched some more, collected them in tank water (I saw one, so maybe there were 10 in the vial?) and nobody died. But I have over 100 fry there (3 spawns) now. However, 12 hours later, no dead fry (possibly very hungry fry)

The unfortunate spawns (small sizes, under 50) received what is possible to be a huge amount of bbs (and possible egg shells for the first 2, I decapped for the last try) - hatched in brine water. So, I took the vial and poured half in the breeding tank, half in the breeding trap holding 1 day old swordtails. I got rounded bellied swordtails and half of bettas dead. Started with about 50 betta fry (about 2 weeks old) and about 20 swordtails. Ended up with about the same number. About a week later I try again to hatch some bbs, I'm left with 4 bettas.
If it's not the bbs, then it must be some condition that happens at the exact same time..

I would really like to keep the current babies.. :) They're between 2 and 4 weeks old and got mw, ve and Hikari First Bites so far. And maybe several bbs yesterday :) And whatever critters happen to grow in the tank.
Feeding time is about 12 hours apart - which worked fine until the bbs..