I had submitted a review earlier and noted that I had stopped some water leaking thru the back hole by tightening up the frog a little more. I've found that when the sunlight is not strong enough the water flow is weaker and some does flow back on itself and out that hole. When the sun gets stronger that leaking stops. It still works for me even though I have it on my patio, but if it was on a table it could be a problem. If you have it in your garden I don't think it would be a problem at all. I still like it.