No you do not need to layer it. It will over time layer out for you. Just throw it in.
The TDS seems to be stabilizing now with many water changes. It's not going over a 100, I can live with that. But this stuff is very different from the last bag I bought. I have the old stuff in a 20 gallon, and its much finer. However I like this stuff. Probably got the end of the batch last time.
Anyone know if the CEC is good on Eco-Complete?