Q: I have a question about a weed killer that my landscaper suggested: Spectracide. Our house is on a lagoon and we have a dog. Our "lawn" is actually stones with a layer of black plastic under them. The weeds are beginning to be a problem. We have found that hand weeding works best but we're looking for alternatives since it takes so much time. We refuse to use anything that is harmful to our water environment, like Roundup. Please let me know what you think. Asked by Kay Editor: Suggestions for Kay?