I asked about this and algae blooms that often occur in stagnant ponds. Shouldn't be an issue. This pond, like all the others I've seen in the community, will have fountains to keep the water circulating. It will also be stocked with fish to feed on any larvae. But, we also back up to a nature preserve, so there's no escaping some insect encounters. It's almost universal that the lanais are fully screened in, and that's one of the first add-ons we'll do. Beyond that, when my wife ventures away from cover to tend to the garden, she's on her own.Mosquitoes?