New Lights coming. Planning on doing a remote refugium. I also want to take out this crushed coral and replace it with Fiji Pink sand. I know we can't remove it all at once. So I was thinking of doing 1/3 at a time between water changes over a months time. In the aquarium you have two engineer gobies, maroon clown, anemone, hi hat, and a two green chromic, GSP, clove polyp, oh and a sixtine wrasse. Taking the slow approach so I don't mess up water parameters to bad. Any other advice or thoughts welcome.