Wait at least 24 hours after adding the Natural Hot Tub Company Water Treatment and Conditioner before testing your water. Our pH acceptable range is 7.2 to 8.2 which is different than what is on the test strip bottle. Our products are not pH dependent so we can have a larger range. If your hot tub water is clear then I would not recommend making any adjustments with only several exceptions. If your alkalinity is over 200 than a slight adjustment will help with preventing scale. If your pH is below 7.2, an adjustment should be made in order to avoid skin irritations. When making adjustments, follow the directions on the pH & Alkalinity Increaser or pH & Alkalinity Decreaser. Wait 24 hours before re-testing then make additional adjustments if necessary.