my awful LFS (but the primary one in Dundee, all those in the area know who I am talking about) sold my sister:
a 2 foot 15 gallon tank, with light heat and filter. the light and heater are sufficient but the filter was not quite so good, a little under filtering IMO.
So after filling with water and the "special additive" and leaving for two weeks , it was now rady to stock. back to the store she went.
this is what they gave her on the first trip:
2 angel fish.
10 neon tetras!
two weeks later, back to the store for more.
3 RTBS!
4 Dwarf Gouramis
I was too young and had little interest in the subject at the time to understand this, but when I first started this hobby in December and got books etc and joined this forum, I was suddenly disgusted.
The neons with the angel fish? ok that sometimes works for people.
The 3 RTBS? I would not even put them in on their own in a tank that size.
unsurprisingly, the RTBS bullied each other till there was only one left, which then terrorised the entire tank till there was him and a neon left. oddly, the neon was the last surviving fish, but my sister was put off the hobby all together. she let it see its natural end out and packed up the tank.