And I ask how to add this to their water because I want to be cost effective with little waist and I am on a watering system and do not know how much water I go though in a day or how much water one of those bottles will treat... I feel it’s safe to say they are not sinking over two liters a day due to the cooler weather... I filled a 5gal bucket two weeks ago and I am just under 3 gal now