I'm thinking of setting up a refugium on the back of my 15 gallon tank. I was wondering what kinds of macroalgae or marine plants are ideal for nutrient export, mainly nitrates. I want those that would do a good job at aborbing nutrients such as nitrates from my main tank. (As I am currently battling a bad case of cyano) I think it's from over feeding. Because I use store bought salt water. Catalina salt water. Use RO water for top off. And salinity in 1.027. Any suggestions would be appreciated.