Need some help figuring out if this mix is safe and effective for killing and preventing future weeds. Prodiamine 65 with Bayer Season long weed control concentrate (2,4-D, Mecoprop-p, Dicamba). First I need to know that these chemicals or ok to mix together and won't harm my lawn. Then I need an idea as to how much to mix. I plan on 1.7 oz of Prodiamine per 2 gallons of water per the instructions. Bayer calls for 2oz per gallon of water for Bermuda. So is it same to assume that I can simply add 4oz of Bayer concentrate to the Prodiamine mix? Also, I'd like to add dish soap or baby shampoo as a surfactant. How much should I add to each 2 gallons of the mix? Thanks in advance for your replies!