who uses red sea test kits (po4)

[Magickiwi]

The Hannah testing kit isn't really very good at all. As was previously stated the ULR Phosphorus checker is about the best test going at the moment. The phosphate checkers give wildly divergent test results even when testing moments apart. I've been through three of the checkers by now and none of them have been reliable.

The issue I've found with the RSM test kits is that the color they give you on your charts or pinwheels don't actually represent the colors you get. In actuality they essentially HINT at the color that represents your phosphate load but they don't ever really have the depth or saturation that the chart colors do.