[naesco]

When I got into the hobby I choose fish because they were, well, pretty.
If there was only one left at the LFS I bought it on the spot because I was afraid someone else would buy it and often another reefer was there looking at it too. The result was I bought fish that had little chance of survival in anyone's tank because I did not know better and predictably the fish got sick and spread disease or ich to others.
I did not know whether the fish was healthy because I did not know what to look for.

With experience you know whether the fish is healthy and you carefully observe it and put it is a QT if there is any sign of a potential problem.
I follow a garlic regimen religiously too ensure that ich will not develop for the first two weeks of a new addition.

As a newbie I bought 'medicins' that did not work and unintentionally over (more is better) or under medicated (metric)the QT with the result that I lost fish in the QT. Regrettably, I also got slack on QT water changes with the result that I had deaths as a result of probable ammonia poisoning.

Like many things in this hobbby (except the requirements of large tanks for tangs) it is a matter of preference. In either case you have to take care.

Thanks for asking. Oh ya, I use plastic pipe instead of live rock as the meds will kill anyting in the live rock. Almost daily water changes and sucking out excess food and detritus out keeps ammonia in check