I have a ten gallon planted tank - I'm dealing with the same issue you are.
First of all, based on research I have conducted, salt will most likely damage your plants in some way, even in small doses. You have already added some salt, I wouldn't add more. Salt is beneficial in that it helps the fish build up their slime coat and fight off the parasite. However, it can damage some plants and invertebrates. There's a constant debate on whether or not to add salt, so you will have to make up your own mind on which route will be most effective for you.
Secondly and most importantly, ich is a VERY temperature sensitive parasite. Arguably one of the safer routes to handle ich is to raise the temperature of your aquarium to 86 degrees Fahrenheit. At 86 degrees F, ich stops reproducing. At 89.5 degrees it will die; however, this is a much higher temperature than many fish are used to and it can roast them along with the ich. Raise the temperature very slowly (think of when you acclimate your fish to a new tank) - raise the temperature one or two degrees every hour and watch the reactions of your fish closely. If your fish respond well to the temperature increase, keep the temperature at 86 degrees for 10-14 days. Do a 20% water change daily, as this helps to remove some of the swimming form of the parasite.
Regarding the lighting, there is also a debate as to whether or not to shut off the lights. Personally, I think changing the light cycle adds more stress to already stressed fish. Plus, your plants will thank you for the added light.
It's really the temperature that we are focused on here.
After roughly 7 days, the white spots should no longer be present on your fish, but continue temperature treatment.
PLEASE avoid common pet store medications. They not only kill plants but can be harmful to fish.
Good luck to you with your tank. Remember, don't panic and be PATIENT!
-Any other questions, PM me.
