Hello

Sorry I don't read this forum on a regular bases and I should.

First I would like to add, copper effects are multiplied in SOFT WATER and Reduced in Hard Water. Hard water has more Parts Per Million of particles for the Copper to attach to and therefore less loose copper is available. I am surprised no one brought this up because it is important when doing maximum curative algae treatment.

Next: It is also my under standing that a certain percentage of salt is used as a disease preventative in Koi ponds. Salt effects certain Microbial and reduces population. Therefore less microbes for the third side of a disease triangle. And once again Hard water will be effected different than Soft water. Hard will already have a higher percentage of salt compared to soft water.