I have a 45 gallon AIO that has been sitting at 0.1 phosphates for 2 weeks. I only feed frozen food daily and does ocean magic phytoplankton every two days. I have some Chaeto in my refugium on the back of my tank that is about the size of a softball. I would think the Chaeto would have reduced my phosphates by now but it is constantly at 0.1. I know 0.1 isn't that high but I would rather be under a little bit. Any ideas on reducing?