you can throw all the treatments in the world at it and still lose fish
as the supposed cures can be stressful to the fish as well
pristine water conditions and as little stress as possible is the best way to deal with it
this gives your fish's immune system the best chance of coping with the parasite
fish that come through it seem to build up resistance to it
are you sure that it is white spot you have affecting your fish
hyposalinity is to hold your salinity at 1.008 to 1.009 for at least 4 weeks after the last spot has been seen on your fish
controlling your water quality and Ph will be important as well during this treatment