Riley Soap Go Easy, I think it was UMISS that said 2 tbsp per 5 gal. My Favorite TJ formula is 0.4 oz per gal, less than 1/2 tbsp. Soap has got to be the real cheap dishsoap, Like Octagon, Ivory etc, NO Anti-bacterial, Ultra or concentrated. or Laundry, Some might even prefer a baby shampoo or castile soap. 1 TBSP PER GAL ABSOLUTE MAXIMUM. Lord Byron