All the dip does is to simply rupture the cell of the spore but there are 100's more in waiting .. Heat will do the same thing but with less stress and making the problem worse. This is why so many report My fish has ich with in a day or two of them adding them to their tanks fish are stressed and tweaked and then the little pest pop up from the depths and find a new weak host fish to feed on . I have had systems to run 6 yrs or longer nothing new ever added only corals clipping removed but power would go off water would cool and or something would drastically change with the system and baaam ich everywhere . I have to wonder where it came in from ? This is why I say all tanks have the spores in waiting.. I have seen this happen to myself more then once and many others I know personally Oswell .. Also over the yrs I have noticed Fall and spring the pest are reported most often. Many old timers used to say it was the lighting and temp changes of the seasons ? But I find the seasons to play a role also.. .. I have a lot of people here to tell me that they tried this methoed ad wow it worked Far better then all treatments . But its for ich not oddinium. one is like a flea and the other is like heart worms . Worst thing ich does is the secondary infections sometimes . And thats from lack of eating and the immune system getting weaker and less resistance .. again like a old flea ridden dog being drained and not flea dipped ..Or a common cold allowed to go into pneumonia and not treated.. This is how a old friend/customer/former family dr explained it to me 45 yrs ago this is how he treated his Marine fish tanks way back in the day..