Hey everyone. Trying to do some more research on filtration possibilities for my 30gallon tank. I just have a hang on back filter. I'm not sure I want to go the sump route... Is there any luck with having 1 or 2 species of macroalgae in the actual tank or is it best to have a refugium? I guess for example i've been looking at Mermaid's Tail/Fan and Caulerpa prolifera. It's honestly only my nitrates I am trying to bring down a little lower, they aren't super high just want them a little lower and done more in a natural approach than chemicals. My weekly water changes keep the nutrients at a manageable level but that is weekly water changes. I would like to go to biweekly water changes. Having refugiums or macroalgae in the tank help that? Any advice is appreciated I am still new here and learning everyday.