Do you source all of your starter items at the same shop?

It depends really. If I want to make a tank that has a wide variety of things in it; sure, I'd browse around for different things that would go good with it. Then ofcourse, I hate to have too much stuff, as I don't want to have to have issues figuring out if the fish are healthy, if I cannot see them because of what is in the tank.

I tend to purchase from various shops, since a lot have a good selection of items but their prices are widely different. Other times a shop tends to only stock items from a given vendor where as another shop might use another vendor.

Wherever I can find the best deals, that's where I'd shop.

When we used to have a fish tank we would get supplies from different places , as not all places had the best deal
or all the items you wanted