Howdy..I emptied my two 50 gal top ponds today looking for frogs that had chosen a bad place to overwinter...found one little guy and tossed it in the big (600 gal) pond. I know there are 2 frogs in there with all my fish and I am sure there are more. I was able to send 4 of my 2 yr old fish to a pet shop so I think we should be ok for overwintering now. I have 4 "frog pots" (small plant pots filled with cheese cloth) and all the lilly pots in the pond ready for winter. The "tent" will go on at the last minute when I have to shut the pump off for the winter. The question is...I always put a bit of pond salt in just before I shut the pond down.....will this hurt the frogs?