I'm 2 weeks into my first dry start with HC Cuba and hair grass, things seem fine and no adverse affects with Amazonia (so far).
I have read a few times not to use EI water due to burning tho.
What temp do u have inside tank?
I'll stop with the EI water but I have removed the Alternanthera and Arcuata to my main tank and just have the staurogyne in there now, might try some HC and hairgrass next