Indoor salt water pond

[Bowhunterking]

I want to build a sting ray pond in a petstore that I want to open, I was woundering if I can just build it out of concrete or if I have to liner it with something. And is there a special kind of concrete to use for the pond.Thanks
Ron

 

[Scottyhorse]

I'm not expert here, but I would imagine that you would want to have the inside very smooth.

 

[Bowhunterking]

Yea I have a friend who's a mason, and is amazing at what he dose.