I keep a variety of macros, lr rubble, ls, some hermits, a grip of pods, and a ton of amphipods.
I keep my fast growing macros well pruined to keep them from going sexual while letting the slow growing macros start to take over. My favorite of the slow growers is red grape caulphera, just for it's color and beauty. I have also found feather caulerpa to be slow growing, managable, and quite attractive looking.
I keep my fuge lit 21/7. The light is off during the middle of the displays photperiod, just to let the bulb rest and ease up on some of the heat. I have 48w on my 20g refugium. I keep the refugium next to the display like it was it's wn tank. Many people admire it's beauty.
I also have a high enough filtration system to handel it if the caulphera does crash.
I would not invest in "it's a miracle any one pays for mud" or similar products. They have proven to be ineffective and not long lasting IMO. Better to go with LS and LR.
Good Luck