Liquid life is not alive either, it says so in their pamphlet. That's what I have been feeding my tank with whilst getting the plankton station going. I know that you can use Liquid Life or DTs to fatten up rotifers, brine shrimp, mysid, and such, but it is a concentrate from the live microalgae that is then rendered devoid of the growing medium. That's why it is so pure and does not cause algae growth problems.
Live microalgae only lives about a week without being replenished so that it can continue to "procreate" for the lack of a better term (they are plants so they can't "procreate", ole dopey me!!) I think I mean propagate.... The microalgae needs a food source, oxygenation, and light to live. You don't get those things in a bottle that you keep in the freezer or fridge!!
Drew