checked the salinity , ph, ammonia , etc. in pond yesterday . salt level was half what i wanted . i am stumped by where the salt is going as this is a common occurrence in our pond . no i haven't added water. we were wondering if one could use rock salt or salt sold in stores for making ice cream rather than going to pond store and getting ''pond salt'' . i feel that is a ''yes'' but would like comments from you folks that are much more knowledgeable than i . thanks once again for your help . . .peace