He he he... well... as my mother said.. "Do as I say, not as I do".
I do, in fact, have a bluestripe in my Reidi system. Before I got him, he had been in another tank, for some time, with Captive Bred Reidi (in New Hampshire) and all of the Reidi and pipe tank mates were fine.
I did
QT him for weeks anyway, but then put him in the 26 Bow with my herd.
Yes, even though the other fish in his previous tank were happy and healthy for some time, it was still a crap shoot. The issues of "wild" pathogens and resilience against said pathogens with Captive Bred fish does still exist. This is why most sygnathid keepers are very strong in their opinions on this matter.
Let's face it. Sygnathids are just NOT very easy to keep. The only people who are crazy enough to dedicate their free time to keeping them MUST be passionate about them. With that said, they would not take that gamble. These lil fish are their babies, and we would never put our babies in harms way right?
If I had an opportunity to get additional pipefish, I'd to it. However, I'd not put them into the pony tank unless I had a high confidence rating like I did last time. Actually, I've moved on into "species only" biospheres now. I'd have no problem setting up a system for the pipes. Finally, there are a few pipes (like the Janss' Pipefish - Doryrhamphus janssi and the Bluestripe Doryrhamphus excisus) who fare very well and actually preferr the currents etc. of a reef-like system.
Dave