Its Hollybush Aquatics at Hollybush Garden Centre. It is on the road signposted Willenhall from Junction 11a of the M6. It is a huge shop. If you are coming from the M6 South going Northbound as you come off the island it is the last exit before getting back on the motorway the way you came. The shop is a few hundres yards from the motorway island on the left hand side. One of the biggest garden centres in the area, it has grown from a couple of sheds when I was a little girl.
Buddy, I think you may be right, only problem is, since they think they sold me a female, I am not too sure on their sexing skills. When I asked if they had any males they said no. I could only see the top fin once it was in the bag.
The shop do have a stunning 7 foot display tank, in their is the largest and fattest Mandarin I have ever seen in the flesh. It is huge.