I do agree, that buying the fish only encourages bad care ;-( I refused to buy even OBJECTS from one store because of their complete lack of brains. They were showcasing their "wonderful" betta homes, like the gumball machine, the 0.5 gallons... All of which had dropsy, ich, rot, or were dead. GREAT showcasing
I pull the betta fish cups FORWARD to be seen. I make the employees take the dead ones. And I ask for the sick ones for super cheap, or free.
Anyways, I tried getting a female from Petsmart for cheaper, and wasn't going to bring her back since she had rot down to her body... but they tore her cup from my hands and said no.
If they refuse, ask for a final sale, to show you aren't bringing them back. Or ask for free, and a final sale, no return. That way, you don't lose money, they don't get money, and the fish overall get better care. YES we all know they are tropical fish, but try heating 1 gallons. I don't expext you to heat every 1 gallon, or buy fantastical 5 gallons that are heated, filtered and cycled
Keep doing what you are doing - you need advice, we'll help ya
On a side note, my fishies have the warmest room in the house with a room heater
That's why I still rescue. I can supply warm water, proper cleanings, etc. Try adopting them out!!