hello there guy w/ the macro that is turning white, is it grape macro algae? i just got some too and some of its turning white, do not put this stuff in your tank. if its in your tank already, then get some water in a bucket, and very very carefully remove the macro algae from the tank, try not to move it much, be slow and cautious as the white part of the algae is mushy and will fall apart making your tank cloudy, im just starting to filter it all out after a day, put the macro in the bucket and shake it really good, this will remove all of the dead white macro.
if your putting it in a fuge, do not turn off the lights in the fuge, i placed my macro in a 1 gallon tank w/ the light on 24/7 in salt water from my tank untill my sump/fuge arrives in the mail, i had gotten some iron supplement and my macro turned from light green to a dark forest green and is firm, no longer soft, i have it in a dish right now, but youll have to plant it so that it will grow roots, id recomend placing it on a rock so that moving it later will be easy and trimming it will be easy, so you will cut the right ends w/out worring which end to cut if your macro is currently in a tangled ball,
if its in a ball, its best to untangle it under water.
and about the purple up, my tank seems to be loosing water faster since its addition. just an observation. my tank filter didnt make much noise but now im adding more and more water everyday to prevent the slashing noise at night.