This formula now has 4 times the active ingredients compared to the product we were showing at the S.E.M.A. Show, and this bottle size is now 12oz. You still use only 1 bottle for a 4 gallon system if using anti-freeze. Use 2 bottles if you are not using anti-freeze (i.e. plain tap water).
This formula also has a lower PH value (8.5) so it will not be harmfull to the aluminum in the system (several of our competitors formulas have PH values above 10!)