Good point, DM, but unfortunately not everyone wants to listen. I tried in my LFS the other day. She had been sent away from another LFS, they refused to sell her fish as her 30l tank was already way overstocked. But she insisted on buying a bristlenose. She even asked me if they could go into a 30l and I said no and I said personally I'd only put a betta into a 30l, but she just didn't want to listen. A few minutes later I saw her chatting to some of the staff, don't know if she got any as I had to leave, but sometimes people just don't want to know that they are harming their fish.