I have a 120 gallon reef tank with 12 small fish, the largest are a pygmy angel and a blue fin damsel. I am currently fighting red algae, cyano I believe. I know that Yellow tangs are listed as herbivores. Do they consume red algae? I realize I need address other issues such as a better skimmer, (I use a Tom Aquatics canister/wet dry that has a built in air pump fed skimmer) and also perhaps an overfeeding problem. Still, will the addition of a yellow tang help control red algae or do these fish prefer only greens? Are there any fish that do relish red algae?