Are you not going to do your own QT on them? If you did, I would think TTM would stand a pretty good chance of getting rid of any hitchhiking dinos. By the time you put them through that much new water, you would be in good shape.
I guess if you trust the source well enough and know they have strict QT, you could always acclimate them in one bucket, transfer them to a second bucket with tank water, taking as little water as possible, then do one more for good measure, then into your DT.
But as others have said, most algae is present in most systems, so unless yours is brand new and you started with dry rock and sand... I have had minor dino outbreaks in the past, only to have them subside. Never got to what I would consider a problem. If conditions aren't right for them, they wont grow. The above would be a precaution if you wanted to take the extra steps.