I've been reading up on the Paroon shark and realize it should NOT be keept in a tank.
The problem is that in my local petstore they "keep" a paroon shark.
The fish is about 40 cm (15") and is keept in a 200 l (52 gallon) tank. I can't bear to see an animal being treated like this.

I'm thinking of bying it and I'm wondering if I could give it a "better" life.
If I could, what size should the tank be???
I've been looking at tanks that are 720-1152 l. I know that no tank keept at home can give this fish a good life, but my question is: would it suffer as much in a bigger tank (720-1152 l) or would I be doing it a favor?
Please reply so I know what to do
Thank you, SCZ