I don't, but don't use a hose end sprayer in this case.

Pre emergents are generally applied in ounces, some even tenths of an ounce, per 1000 square feet. You can't get that accuracy with a hose end.

Thanks. I just grabbed a new round up pump sprayer. I am going to try to figure out the ratio. I know i need about 9 ounces of dimension for 25000 square feet. Yave to figure out how much water goes in pump to cover 25000. Just havent opened box yet