There is not enough rotifers in a $20 bottle (i doubt even a days worth) to raise a clutch of clownfish. Rotifers (do not posses a high nutritional value) need to be enriched with phytoplankton every 2 to 4 hours for nutritional (EPA, DHA, ARA, and other nutrients) value due to a high metabolism . You can read more about rotifers @ Reedmariculture.com. You could buy 5 million rotifers from Reef Nutrition @$75 plus shipping, but would sill need 2 buckets, air, and to feed them RG Complete twice a day. You should be able to keep the rotifers alive for a week if not over or under feed. Order another 5 million for week 2 and by day 14 they should be weaned on to TDO "A", no more rotifers needed.