That's how I siphon the bbs but sometimes I do collect the eggs, which is hard to avoid.
I fed them live brine last night and they went for it with no problems. Still feeding them bbs too. I'm trying to feed them with crushed pellets and hopefully they'll have weaned before I go on holiday next week. My friend won't be able to feed them bbs so crushed pellets will have to do when I'm gone.
I think you can cause issues if your fry are getting a lot of unhatched BBS eggs.
How have you been siphoning the BBS off to feed? I usually shine a torch about halfway up my hatchery jar and the BBS congregate around this. Then I just siphon it out with airline tubing into a cup with a coffee filter over the top and it seems to give me much less eggs and egg shells.
Worst that happens is it is too big for your fry, but if it is live they should go for it. My fry take on live blackworms that are twice the size of them. I figure fish fry in the wild would probably eat whatever fit into their mouths as they would want to grow as fast as possible.
I just wasn't sure if their digestive system would be able to break down the food at this stage.
I will try live brine shrimp tonight and see if they go for it.
I also read that the fry may have swim bladder problems from eating bbs egg shells...? Hope this doesn't cause permanent damage to their digestive system... My fry seem to be swimming a lot better and more often but still lie at the bottom on their sides (when resting).
If the fry are big enough to take a food, I will start feeding it. Usually you will find that for bigger food if they are interested, they will pick at it and play tug-of-war with it so it breaks up and they can eat it.
Fry can take on surprisingly large food. I have fed some of mine frozen brine shrimp and they are not that big.
Also if they are big enough, now might be the time to start introducing a high-quality, high-protein pellet if they aren't already on one. I try and wean my fry onto pellets early on as some can be buggers about switching over.
My fry are at 7 weeks old now and I was wondering if I could start feeding them other food besides bbs. I can get hold of brine shrimp and frozen blood worms. Will any of these be ok to feed at this stage?