I have a new pond that is currently filling. I am wanting to test it for stocking Redfish. I was told by a friend that I need to test for cholrides.(sp)

Do I need a sterile sample bottle? If so, where can I find one. He also said that A&M can test the water. Where do I get the water from? Off the top or at a certain depth?

This friend of mine has done a great job growing Redfish on the ranch in South Texas.

Any help would be grateful.

Pat