and it works very well.Holmium(III) oxide but what I think you mean is H2o2 which is Hydrogen Peroxide. People like myself us H2o2 to treat for some varieties of Algae. Spot treating with H2o2 kills it.
That might be my fault, I had a dyslexic moment on my own Algae thread.Holmium(III) oxide but what I think you mean is H2o2 which is Hydrogen Peroxide.