Salt is also great for newly recieved discus fish or discus fish that have any fin nips, tears etc... Salt will speed up the discus fish healing process greatly and prevent almost all bacterial and fungal problems on your discus fish... I had an adult Uaru jump out of a 125 to find himself 5 feet down on concrete. Fortunaltely for him I found him before time ran out. Long story short, I didn't add salt right away and within 36 hrs his entire side was covered in fungus... 1.5 cups of salt and 36 hrs later all of the fungus was gone, 2 weeks later no signs of the mishap were visable(excluding a better hood on the tank). Salt treatments in your discus fish aquarium can be repeated after 48 hrs followed by a water change. I have used the 1 cup per 100 dose on numerous planted discus fish tanks with no problems. Salt is poured away from plant bases, but directly in the discus fish tank. Keep in mind some plants are salt sensitive and use at your own risk. When acclimating your new discus fish to the aquaria, occasionally their fins may be torn from being sloshed around in the bags during shipping or abrasions from the bags or nets may have occured.. this should be of no concern. Use the salt treatment and the Discus Fish fins will heal in a matter of 24-48 hours.