I assume it’s if you have a problem and remove the fish and QT the fish and wait the 11 weeks for the ich to be gone and run a test to make sure prior to putting the fish back in. That’s the only reason I would but other then that I truly agree with you.What would you do with the information, I wonder. I wouldn’t bother, you’ve either got a problem, in which case you would know about it, or you haven’t a problem.