I know a lot of container gardeners amend their water with vinegar to lower it's pH level, and I know a lot of container gardeners also fertigate with Foliage Pro. FP instructions say to add water to the correct amount of FP (vs filling the watering can with water and then adding FP). Does it matter when the vinegar goes in? Will vinegar have some chemical reaction with the FP if those two are added to the watering can first?