Hi can anyone help with my nitrate and phosphate levels? Ive recently added new skimmer and removed some coral. And had 2 remove some live rock (due 2 aptasia).. all my other levels are fine but im struggling to lower these.. i put some nice macroalgae in tank but my tuxedo urchin keeps takin it around tank on its back lol im lookin 4 a long term fix rather than a quick chemical remedy. All fish etc are fine tho