Vincent, this time of year around St.louis with moderate air temps killing all of your algae at one time shouldn't be a problem. This is asuming your pond isn't more than 40-50% covered. If it's primarily shoreline growth out to 3-4ft you'll be fine. What area of St.Louis are you from? I'm from the Illinois side about 40 miles out. If you're somewhat close and we could work out a schedule I'd be happy to give you some assistance.
