I recently posted about my Stenner pump build on another thread. So far, the system is working great but I've notice one annoying thing about the Stenner 30 gallon tank. It has rained twice since the install and I've noticed that there is no way for rainwater to drain from the top of the tank. There is probably about 1/4" of standing water on top of the tank. It would be nice if there were a couple of notches in the top rim of the tank to allow water to drain. Unless I dry the top of the tank after every rain, this seems like it is going to be a breeding ground for mosquitoes during the summer. Has anybody else noticed this?