Hyperlitexr50
Member
I have been fighting algae for over a year and now I realized I have phosphates in my sand. I took a little rock out and a little sand and put it in a cup with fresh saltwater. I tested after a week and the cup with sand in it tested .19 for phosphates. So my question is will sand always have phosphates in it or should I remove all my sand. If I do choose to remove all my sand (1-2.5in) should I do it very slow or all at once. I have tried everything else to beat algae so this is my next step.