You can apply Ironite Mineral Supplement 1-0-1 as an additional treatment. However, since the Ammonium Sulfate will also provide nitrogen and greening, we recommend waiting at least 1-2 weeks between those applications so that you can check the results from the Ammonium Sulfate first.
Per the product label we have been provided by the manufacturer the Ironite Mineral Supplement 1-0-0 contains 20% Iron and 5% Sulfur. We do not see any orders placed with us under your email for the product, so we cannot comment on products purchased from others retailers.