Yeah, pests are a thing to worry about. But the thing is they can come into your tank in so many diff ways. You are going to add frags of coral that can carry hitchikers no matter what, dipping and qt are good practice for sure, but not 100%. On the other hand, there are a lot of really good critters on rocks too: sponges clean the water, little snails eat leftover food and algae, and a broad spectrum of bacteria to process nitrogen waste (poop and pee).
So what you're thinking about is a trade off where you lose all of that good stuff, which can take years to replace, to keep out a few baddies. Even though there's a good chance you'll add a baddie with the first sps you buy.
If I were you, I would hang out in the hitchiker sticky for a while and get a feel for what is a pest and what is a friend. There's only a few harmful critters. If your buds tank is doing well, it's unlikely they have a major problem, and a little research will teach you what to keep an eye out for, and settle your mind. Then if anything pops up you'll be armed and ready to destroy it.
Also, if you want to post a pic of the tank, we can take a gander and make sure there's nothing obvi that will be an issue. I'm assuming the tank isn't overrun will aiptasia or algae, that'd be a diff story.
Welcome to the forum!
