I started a daphnia culture with as soon as I found eggs. However I had a higher than expected success rate with my eggs and most of the daphnia species were too big for their little mouths so supplies were soon scarse. I had brine shrimp bubbling away in my shed but they didn't hatch because of lack of light/ heat. I now have half a coke bottle hanging in a carrier bag, an air line through the cap with the smallest/ chaepest air pump you can get. I also had a lamp on it for heat/ light. I now have thousands of shrimp and the axies are happy with fat bellies. The shrimp will die in fresh water after several hours though and you have to be carefull not to add salt water to your axies, whereas the daphnia will happily swim around till they are munched. I'm a newbie at this as well but it seems to be working so far. Hope this helps.