green water aka phytoplankton... here are the plan for a culture station and some info for you. I got my started cultures from Florida aqua farm.
Phyto
http://www.advancedaquarist.com/issu...02/breeder.htm
Rotifers
http://www.advancedaquarist.com/issu...02/breeder.htm
culture station
http://www.reefkeeping.com/issues/2002-07/ds/index.php
Starter cultures
www.florida-aqua-farms.com/
You will need a Nanochloropsus culture and a Tetraselmis or Isocrysis culture for rotifers. Then you will want some resting rotifers. This will get your cultures going. You might just want to get the kit with the book it will explain better than I can.
One thing to note, I believe they go way overboard on sterilization and I do not think it is necessary. I have not had a culture crash on me yet unless I just neglected it (split it when it was ready). All I do is take a coke bottle (or any other 2 liter bottle with lid on it), make sure when you are done with the coke you cap it tightly until ready to use. Rinse it several times with HOT water from the tap and use RO water to make your salt water for the culture... NOT RO/DI, I get much denser and better cultures with RO water (I tested RO, RO/DI and tap)...
Anyway I have rambled on enough, hope this helps. I can go into more detail if everyone would like.