New reef aquarium fan

hej, we live in northern europe, and have experimented with reef
aquariums. Our live rocks (filled with algae, anemones, seaplants and
tiny brushworms) are growing great.. and we just found a little, white
hairy crab inside, which is getting ready to leave his crevices
(probably getting too small for him)... I would like some links to
info about feeding these anomones and tiny animals. how do we make our
own phytoplankton.. we have experiemented with making small
plankton-like animals out of banana peels, which has been great so
far.. but I don't think these animals can live on bananas and shrimp
alone.. we are trying to be self-sufficient and not buy all kinds of
stuff... any ideas??
My boyfriend has had aquariums forever, and reef aquarium for 10 years,
but there has been little or no information available in our country,
so its been learning by doing. Now the internet opens for the
possibility of trading ideas and experiences...anybody want to be a
penfriend??
Best wishes and good luck with the fishes... Hannah and Kenn