Welcome to TRT!!
uhh, ohh, you said the A word, anemone.
most anemones need very strong lighting. what kind of lighting were you thinking of using? a 40 breeder is pretty shallow so you may be able to get away with a fully packed T5 flourescent canopy. i would suggest a couple of 150w HQI Metal halids or a couple of 175w mogul metal halides though. these give more of the light the anemones are looking for.
if you stick with bubble tip anemones you should be fine with any strong lighting combination. if you are looking at other kinds of anemones i would really strongly suggest getting a MH setup.
do you have a sump for the tank? if not i would suggest a
AquaC remora skimmer.
i prefer the Ebo-Jager heaters. i would think a 75w should be fine for that sized tank.
as for flow. the new
Seio pumps are pretty good for the price and wattage.
G~