Hi all, newbie to saltwater tanks here.... I've had a problem with algae and bought the API Phosphate test kit. I've checked procedure over and over, yet everything I test is showing 1.0-2.0ppm. In addition to my tank water, I've tested saltwater from my LFS, bottled water, distilled water, and freshwater from my RO tap..... Can this test kit be faulty? SHould I bite the bullet and buy a Hanna? Thanks in advance!