I added a small amount of salt to my 65gal tank because it says its good for my fish. I used freshwater aquarium salt. I used less than it said because it says some aquarium plants can be sensitive to the salt and since I have 1 plant I decided to just add a small amount until I see if it will effect my plant. Well my plant is fine but since I added the salt I have lost 2 fish. 1 angel and 1 mollie. They started acted out of character and then BAM just died. Was it the aquarium salt? Or is there something else wrong? I do weekly water changes. 1 week I do about a 25% water change and rinse filters then on the second week I do a 50% water change and use new filters. I don't have a master water test kit but I have been using the ones you just dip and they seem to always basically say the same thing ph looks fine and so does my nitrites and nitrates level. I do have a test kit for ammonia which is showing 0 for that.