Yes, I noticed that all my macro algae was slowly wasting away. I tested Nitrate's and Phosphate's and both were 0 from what I could tell. I did let it run for a bit longer testing along the way and still coming up and 0 for both. I picked up the Hanna High Range Nitrate and ULR Phosphate and started dosing Nitrates and Phosphate's currently manual dosing and nitrate max about 11 ppm and phosphates at about .06 trying to drop that back to about .03. Within 2 weeks of dosing what little macro algae I had left is now again flourishing and growing like weeds.