Phosphates always make me nervous. I have always used Rowaphos to keep them down in the .02 to .05 range. I sacrifice deep color for keeping bubble algae under control. Recently, my Nitrates climbed over 20 and even with carbon dosing and water changes, they wouldn't budge. It took removing the Rowaphos to get my microfauna fed enough to chip away at those Nitrates. Lesson learned... after decades of reefing.