OK, I feel really bad now. I've been starving the poor things.
I started off a culture of bbs first thing this morning and another 5 hours later so that I can feed them newly hatched nauplii first thing tomorrow morning and in the afternoon too. How many should I add per ml and what should I do about the bbs that remain uneaten in the tank after 6hrs??
Many thanks for all the comments so far.
Regards
Lisa