I started with DT'S. We also add miracle grow and Kents essential ellements.
Taken from Melevs site:
Recipe:
Starter culture from someone (even DT's would work, I've been told)
Tap water mixed to 1.019 sg
5 ml Miracle Grow Houseplant liquid food, per bottle, per batch
1 ml Kent's Essential Elements
Lighting 16 hours of light, 8 hours of darkness regulated with a timer
Steady bubbling of air via rigid tubing to the base of the bottle
Shaken slightly each day to stir up the solution from the bottom.
Here is his link. NOTE: go to the 01/20/05 Update for the directions I use.
http://www.melevsreef.com/phytoplankton.html