Why do you think you need either? My tank is stocked to the tits, I feed heavily, I do not carbon dose (I add bacteria, but not carbon), I don't even use GFO, and my nutrients are barely readable (N <0.5 ppm, P <0.015). All I use is a big arse skimmer, lots of good flow, a well stocked clean up crew, and good maintenance practices. No fancy gadgets - my sump is empty besides the skimmer that takes up most of the real estate.
Sometimes small things make a big difference, and not always for the good. For example, I added a Gyre to my tank. My tank is only 36" long so the Gyre significantly changed the flow in the tank. It took me awhile to adjust to this, and the livestock too. The Gyre collects junk/detritus below it, and that area had a hair algae outbreak even though there is hardly a whiff of nutrients in the water column. I adjusted the rock a bit, and the other powerheads. The algae cycled out. No big deal. This is part of reef keeping. Read through any of the big SPS journals on here and you will read about a hair algae or cyano outbreak here and there - lots of people with bubble algae. These are all seasoned reefers. These things annoy us, but we make little adjustments and carry on. :bounce2: