Fish shops are supposed to be warm! I agree though, warmth is awesome I MN. Not sure if you are I to other fish besides bettas but Aqualand in Minneapolis is my favorite fish shop at the moment. They have a very nice selection. Surprisingly though they have bettas and they don't look any bettter than petco/petsmart....all their other fish look great though. Funny how that works...
Did you get any of your current fish at the Betta Shop? Hoping to go there this week, they get a new shipment in tomorrow. I'm afraid I'm going to end up buying a couple females for my sorority too and spend more money than I should, hah. I've heard so many good things about that place.
What's you pH? It may be a little on the high side for a CTs fins. Driftwood and/or IAL or Oak leaves might naturally lower it enough to straighten his fins. Of course then you have tea-colored tannins in the water. Some people like that. I don't much.
Pineapple is yellow scales with black scale-tips. If I see a pic, I'll show you. If his body color were blue, he'd be a MG (mustard gas...what an unfortunate description. Thai breeders don't have the background to know that). Color-wise, he's a copper---several layers of color that change when the angle of the light changes. But he's so clearly green..most unusual fish.