most people do big water changes and what does that do? it drops the temp , the whole idea is to keep the temp up, also the more you play with the tank the more something goes wrong i think test the water, temp, and work out why you have it then put the meds in asap! i also cut the lighting down as much i can (its an old tip done years ago before we had good meds)
yes you need to do water changes but only what is needed don't do lots of water changes because i don't think it helps, that's how i deal with white spot and the only time i get it in the shop is when i buy fish in that have it, when fish are shipped to the shops they can get cold and stressed so you will get it on some fish .... that's why shops med when they get a shipment in