This is the finished sponge piece from yesterday. The other piece was nice as well but my picture was weird so I didn't post it. The color is definitely better in this one so will ratchet the dye concentrations up next time I am playing.
This is how it looks now. The white spots are the salts. I used all different sizes today whereas yesterday they were more uniform in size.
This is a closeup of the piece today where you can see some movement in the lighter areas. Much of this piece is very dark so don't know whether anything is happening or not and probably won't know until it dries out. It is sitting in the sun right now still wet but it is supposed to cool overnight.