DJT adding any element without knowing (1 how it will effect what you are trying to establish/grow and (2 what your current system contains (how much natural salt in this case) can cause problems. Two examples. One Bruce should not add salt as his is high now and adding more could kill fish and or plants - what if he did not know this and just added a bunch of salt ? Two what happens if you want to kill FA and it turns out FA can withstand higher salt levels than most plankton species and some fish species. One note of caution - if you recall from history one way conquered enemies were punished was by salting their fields so nothing would grow - not enough salt you die , to much salt you die. It pays to know the limits before the application. Salt lasts a long time and becomes more concentrated with evaporation.