Thanks so much for the comments and words of comfort.
I think I finally have the white spot beat (at least for now). I lost 3 of my Puffers, and 2 Plecs that were in with them. My one SAP still seems to have some sort of lingering affects. He will clamp his tail fin down and lose his balance and sort of do a "whip-de-do" and go around and around, then find his balance and get it back together, and swim normally with tail fin extended out. I can't really say why he would have these bouts, but at least he's alive and that's what counts. The surprising part of all of this is that it didn't seem to affect my Dwarf puffers at all. I have some very tiny little ones too, I mean, really small .... and yet, they didn't seem to get the white spot, nor did they seem to be affected in any way by the medication or the parasite itself, which I am glad for.
So now my Puffer tank looks a bit naked, but I've added an airstone and they all seem to be fine now. I won't be buying from the LFS that I believe gave me the white spot in the first place.
But I do thank God that my Puffers came through this in as good shape as they are, they did have it rather badly because by the time I realised what it was, the parasite had a good hold on them. I will be paying much more attention now.
