In article ,
says...
My experience is that in the UK (and you are in UK or Ireland aren't you
if I remember correctly?),

Yes, that's right - Northern Ireland.

they don't QT as such but keep them off sale
for a period of time to make sure that there are no obvious problems and
the fish acclimatise to the local water conditions - usually around a
week...maybe not all places do this but the ones I use do, and it sounds
like you have the same sort of thing in place...

I'll ask them tomorrow exactly what they do. Their website (such as
it is - one page on the local yellow-pages-style site) states that
they quarantine all their stock for two weeks.

Right now, I have 4 Clown Loaches in QT...it is a normally set up tank -
plants, gravel and driftwood for them to hide under - it is 15 gall...it
also contains other fish - but experience has shown me that Clowns also
benefit from "dither fish" when settling in...

What are "dither fish"?

So give it a go, make sure there are plenty of hiding spaces for them
and keep any eye on them for at least a couple of weeks. Also ensure the
water quality is spot on as I've noticed sensitivity to even the
smallest trace of nitrites...

Thanks, Gill, I'll do that.

--
FishNoob