Reptile & Amphibian Forums

Just wondering if this is needed if the turtles have been treated already.

Any time you add any turtle/tortoise to your collection you are taking a risk. With that in mind, each precaution you take minimizes that risk.
To answer your question directly... yes.
The longer you quarantine the better but forever can sometimes be too short.
Believe it or not the first sentence of this post is your best advice because it all depends.
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Ed
Tortoise_Keepers-subscribe@yahoogroups.com
Trying to keep the fun in Chelonian care

In my experience, most of the time the animals haven't been treated at all, even though you are told they have been. Often, they are treated once or twice which isn't effective when they are being kept in large groups that are infested.

Be cautious. If you have healthy animals, keep them that way by separating your new additions. Go through a fair de-worming and practice good husbandry - wash hands before handling other animals, don't share substrate or foods that have been exposed, clean shared soaking tubs with appropriate solution like chlorhexadine.

I am speaking from personal experience - successes and failures. With imports, expect worms.

Paul

Absolutely correct.
Always do this.

You definetely need to quarintine everything you get in. Even if it is captive bred and has just been treated you need too.