In the summer trees need to be watered two times per week with an average of 2 -to- 4 gallons each time. this product allows you to do that whereas, other products in the market can’t do that.
Most of product in the market designed to hold 15 – 20 gallons, there is not much benefit from putting 20 gallons one time per week because a lot of water is released in the first day and then the soil will dry out after a day or so.