The bucket needs to be 'topped off' or refilled about every 2 weeks or so.
So, when I can dropped by I noticed about 5 to 8 bees drinking on the sponge. I grabbed my cell phone camera but a few flew off but as you can see they seem to like this.
I put in a few ounces of mineral salt to water mix. We have not heard any more complaints from the neighbor! I'm not too worried because I will 'bribe' him in August with some honey ! :-)