Help; Gnats in the black water tank
I moved to a campground and got gnats in my black water tank as soon as I hooked up. I keep the valve closed and chemicals in the tank. I have used vinegar in the tank and have taken to spraying flying insect spray down the hole when I flush but to no avail. I have flushed the tank out several times but they return. How can I prevent these things and get rid of them?
Denis, Ruth and Gracie
the K-9 Dashboard Ornament
2007 Newmar Baystar 3202