okay guys, i edited it. tell me what needs fixed now
Though I have been a happy customer to your Mentor location in the past, I'm no longer willing to spend my money in places where animals are kept in inproper conditions. [If I do return and see bettas in these conditions again, or even the fish with rubber bands in the tank, I will be taking more action and report your store to the animal authorities.]*
*are there animal authorities for fish?
Yes, it's animal protection and control, you can probably get their number by calling your local humane society. I've already reported one of my LFS' to them and they were most grateful, and promised to send someone to the store to check it out.
Quick note about spelling, "inproper' should be "improper". Possibly a typo, thought I'd point that out. Also, I would take out the [ ] brackets.
Otherwise it sounds good.