I need to find a species of phytoplankton and a source. I want to start culturing some to feed copepods and possibly a few filter feeding inverts. I need something affordable and by that mean I don't have the money many reefers have, but I don't want to waist money on something that will just be a head ache or unhealthy for my tanks. I've seen lots of sources, but every site selling them will tell you the species they have to sell is the best. Anyone read a really good article focusing on the best phyto for hobbyist to culture? What would you use?