macro algae in reef tank

Hey y'all, I recently acquired a 40 gal breeder to replace the 30 cube next to my desk, currently housing very small recovering from previous tank crash corals: mostly zoas, a bali green slimer, a toadstool, two blastos and some mushrooms. Fish wise I have a sailfin blenny and a pygmy angel...

I just got a good amount of macro algae: a couple ulva, a red fern, a pom pom, blue octhodes, and queen of hearts. Right now they’re just kind of floating around my tank because i’m waiting on glue to be delivered, but while I wait I thought i’d ask. What’s the best way to attach macros to live...

I have a 10 gallon reef tank with a clown some live rock and a xenia. I saw a tank with macro algae and decided to look into it… would it be ok with the coral?