Alright I know this is a very common problem, I have a big green hair algae problem. Yesterday I installed a refugium and I added another urchin for a total of 2 urchins in the tank currently. I already know of some ways to get rid of GHA but more information is always a good thing to have. I was thinking about running GFO but I am not sure if I should do that since I have the refugium with macroalgae in it. This is a 24-gallon tank, 34 if you include the sump and refugium. Thanks for the help.


