First three pics look like some type of sponge,The other one looks like Chaetomorpha in its early stage,could be another type of macro though.I have some white sponge in my 150 that looks just like the first pic.
Your tank looks great,How long has it been set up?
only 6 days! I have seeded it with some media from my other tank and some sand from it too, just waiting for everything to settle down now. Will eventually get more rock and build it up more.