On the Road Less Traveled
I have a tri-level home, and a secondary sump pit in the garage, under the staircase that takes you from the lowest level of the house out to the garage. The pit is seldom ever used, only on heavy rain. Stagnant enough that mosquitoes are into it, and it is starting to smell. Anything I can put in the pit to eliminate both? I am not going to use chlorine, as I've read that it is bad on the pump.