150lb> = 1 Gallon of water = 8G of Sea Salt or Iodized Salt
150-200lb = 1.5 Gallon of water = 12G of Sea Salt or Iodized Salt
200< = 2 Gallon of water = 16G of Sea Salt or Iodized Salt
Salt in my opinion is better then creatine, and caffeine combined for maximum performance and recovery this is a must. As long as your drinking enough water and you are training on a consistent basis get your salt in.
Here are some videos that help reinerate my argument!