I think there's a difference between annoying pests like bristleworms and asterina stars, and dangerous pests like zoa eating nudis, AEFW, and ich.
I have colonista snails, asterina stars, pineapple sponges, vermetid snails, and who knows what else. They aren't bad in small, controlled numbers, but I wouldn't want them to take over the tank. However, most of them are pretty easy to manage population wise so it's fine, because I'm in control and I can decide how many of each I want.
On the other hand, pests like coral eaters and many fish parasites are without a doubt detrimental to the reef, and need to be purged with extreme prejudice. I will say that some pests, like flatworms and nudis can be pretty easily dealt with just by having the right predators, but I'd still prefer not having them ever; the wrasses are just there for insurance.
I'm not a fan of bristleworms personally, but I'm not going to lose sleep if a couple pop up in my tank eventually. However, if I see a frag with aiptasia on it you bet I'm ripping that thing off and plunking the frag in quarantine. And if there's no way to remove the aiptasia because it's buried in a rock, then it's going in the trash.
I have colonista snails, asterina stars, pineapple sponges, vermetid snails, and who knows what else. They aren't bad in small, controlled numbers, but I wouldn't want them to take over the tank. However, most of them are pretty easy to manage population wise so it's fine, because I'm in control and I can decide how many of each I want.
On the other hand, pests like coral eaters and many fish parasites are without a doubt detrimental to the reef, and need to be purged with extreme prejudice. I will say that some pests, like flatworms and nudis can be pretty easily dealt with just by having the right predators, but I'd still prefer not having them ever; the wrasses are just there for insurance.
I'm not a fan of bristleworms personally, but I'm not going to lose sleep if a couple pop up in my tank eventually. However, if I see a frag with aiptasia on it you bet I'm ripping that thing off and plunking the frag in quarantine. And if there's no way to remove the aiptasia because it's buried in a rock, then it's going in the trash.