Not a bad method, only method that works without meds, and is fairly easy to accomplish wiothout a ton of other equipment floating around. You just have to realize it only handles ich, and only ich. Any any other maladies have to be treated another way.^^
Truly a bad method. With instance bacteria around to cycle on the fly, and copper meter to test, ttm is truly awful.
I used to use it with prazi on the last day of transfer 2 and 4. My last fish I did this with, a big powder blue went thru it, followed to the T (3 sets of equipment, bleach after each use followed by 48 hr dry time, no more than 72 hours between, mostly 60) observed a week after , went into qt, writhing 4 days 11 fish dead with velvet.