In this mornings routine, found 3 dead fry in Batch 4. I guess yesterdays "improvements" did not take well with them. I'm beginning to think this batch is not quite as hardy as the first batch. I'm doing pretty much the same things overall. The only thing I can attribute is the lack of rotifers past 5 DPH. On Batch 3 I kept the rotifers and greening the water until Meta at around 9 DPH. There might be something about their development in the days just before meta and eating the gut loaded rotifers all the time. I did not enrich the brine shrimp because the BBS would have grown too large in the period of enrichment. So this goes on my notes for future speculation. Next batch will have rots until meta. I looked really close at last nights tank shot of Batch 3 and notice no misbars and no flared gills, so environmental issues may not explain the recent mortalities (I know it's only 5, but I get attached to all of them). I should have probably dripped the water instead of dumping it in all at once. Note to self, treat Batch 4 with more care.
I know how difficult this is especially since you have had great success.... You better get that 55 going soon!
