*gives hollow laugh*The golden loaches I think were actually labelled golden algea eaters, really they are more to keep my lego nice and clean, which they are doing brilliantly! When I spoke to the chap in the shop he informed he that they would be ok in a small group, and wouldnt get too big, probably max of 15cm. My parents one is about 10cm and is fine with the fish they have.
If they are the golden morph of the Chinese sucking loach Gyrinocheilus aymonieri they get to more like 30cm. They start off being ok in a group and eating algae, but they get more and more territorial as they get bigger, and by about the 10/15cm mark they'll give up eating algae almost completely, prefering instead to feed on chunks rasped out of the sides of your other fish while they're sleeping.
I'd get rid of the *@%$£*$@% things now if possible. One of the very few fish in the known world I actually actively dislike...(yes, yes, I know that's just the way they've evloved and that they can't help it, but even so...)
You're not the first, nor will you be the last, who's been given wrong information and bad advice by 'the man in the shop', either through blatant lies to make a sale or blather made up on the spot because they don't know.
We see the same thing here near enough every day
P.S; I love the Lego though; that looks brill