2 weeks old fry dies off with swollen belly

[wisefinger]

I have a batch of Blue discus fry where half of the group is lost. They are 2 weeks old and were growing really well. Then some of them got a swollen belly and were always swimming on the surface. After some time they die. It only seems to affect the larger fry, the small fry does fine. I started to feed brine shrimp after 7 days en does partial water changes with aged and pre-heated water. Does anyone have already encountered this issue and what could be a way of treating/preventing this?

[CliffsDiscus]

Over feeding BBS, the fry can't digest the meal so quickly so they get bloated or gassed up. The fry need to exercise to work off their meal, then eat a light meal, better to have more light feedings than a few heavy feedings. Also Epsom salt can be added when hatching the BBS.
BBS will produce sledge and some muck, so larger water changes are required.

Cliff

[wisefinger]

Thanks for the feedback. Honestly, I did not consider overfeeding BBS could be harmful. I will take some more time training the fry to eat BBS and give smaller amounts in the beginning