jmed, what are you planning to test it for? Normally, a package deal testing for various parameters are cheaper than testing individual..of course, each lab is different.

Suggestion: when testing in a string of ponds, say, you have 6 ponds, test the upper most, then middle, and the end. This way, you can see the differential issues between the upper and lower body of water. The center dictates what is going on in the interim. Once again, we need to know what you're planning to test the pond water for?

Leo

* Knowledge and experience yield wisdom. Sharing wisdom expand the generations with crucial knowledge. Unshared wisdom is worth nothing more than rotting manure.