i made a bs hatcher from a airline 2 airtap regulators and 2 old pasta jars!
i hatch ming out at room temperature it takes a little longer nearer 3 days but have had good results. i bought the small packets of ant sally's sanfrancisco brand from tim at ta acuaculture i also got the shell less bbs that you feed dry !
http://www.ta-aquaculture.co.uk/
Tim is a very helpfull guy !
i got one sachet to do 3 hatchings keeping the unused eggs in the fridge in a zip lock bag.
the hotter the temperature the faster the hatch .........could it be the brand you bought are have been on the shelf along time?
heres the hatcher i made with 2 jars and you could do more. alot of people use upside down coke bottles and as i understand it its better if you dont use a airstone as it causes alot of froth.
http://www.cichlid-forum.com/article...p_hatchery.php