Hmm, well, I don't think you can separate the economics as DT's is orders of magnitude more expensive, but I will for now
First off, TB isn't all dead. You can actually start your own culture from it.
Next, it depends on how fast you use it up. Dr Ron and others have stated that the nutritional value decrease fairly fast. Because of this I've gone to the 35ml viles. more costly, but still loads cheaper than DT's and I use it up faster.
As for the GP, again, lots of nutrition and lots of phosphates. you need to be careful feeding them.
I think it's safe to say that DT's being live is the best, it's just that we cant all always afford the best
------------------
Bill Esposito
bespo@cereal.mv.com
JAqua for the AquaController 2
http://cereal.mv.com/jaqua.html
My Reef Page
http://cereal.mv.com/reef
The box said "Use Win 95 or better", I chose better so I run
OS/2!