Hi guys my first post !!!
I used a product call zm 100 , the company is zm ltd in the uk , you could try them .
last year i raised a huge amount of fry to 3cm's on the zm100 , but my wife unpluged the pond system by mistake ,and by the morning there were all dead . anyway its a new year and the company has bought out a new fry food called zm oo , partical size <.95 micron
which is equivilent to paramecia and rotifers .
web
www.zmsystems.co.uk have alook as it may have what your looking for .
i'l be useing it this year , and superglueing the plug in the socket
steve