We have a terrible problem with biting flies by our pool. We suspect they're coming from the wetlands on the unowned land next to us and they can ruin time spent by the pool as they dive-bomb anyone swimming. Last year we tried the fly bags from Amazon that, while they obviously caught lots of other flies as emptying them was one of the more disgusting experiences in my life, didn't solve the pool problem. This year we're looking at an H-Trap as they get very good reviews, but they're relatively pricey so we don't want to throw money away if we can avoid it. Has anyone tried one of these near a pool? If so, how close to the pool do you put it - there's online photos of them right next to a pool, but surely the aim should be to catch the flies before they can even see us tasty humans?