salt again

Interesting to note that although I have never added salt to my pond I am
getting a reading of 0.01% on my Accu-chek salt tester. The salt content is
due entirely to salt contained in the tap water used to top up the pond due
to evaporation. According to the local water supplier, the salt content is
very minute and almost immeasurable and is therefore included in the Total
Dissolved Solids measurement.
All ponders should be aware that even if they don't add salt they should
still test for salt content as a result of continuous top-ups.
Les