Review on 12-Pack OZMI Plant Self-Watering Spikes With Slow Release Control Valve - Automatic Irrigation Equipment For Home And Vacation Plant Watering, Adjustable Drip System For Optimal Water Volume by Eddie Pollard

I really can not accurately give a review, I’ll be using it in Sept. when we are gone for 2 weeks, but so far this is what I have. Bottles just fit down into the cap, they do not screw in. Instructions say you can adjust the flow of the water to drip up to 2 weeks, but there is now markings that say, this trip is for 2 weeks, this trip is for 1 week, this for 3 days, etc. It’s just a guessing game, Lefty loosely, righty tightly, screw the little valve to the right where it is tighter, less water comes out, move to the left, more comes out. It will work for me, and either the plants will be just fine, or will die, so we shall see in Sept.