If you’re reading this, you either just bought a house in Polk County with a pool, or you’re tired of looking at a green swamp in your backyard and wondering where you went wrong.

If you live in Lakeland, Winter Haven, or anywhere else in Polk County, you know the drill. It’s 4:00 PM in July, the sky turns a bruised shade of purple, and within minutes, a wall of water descends on your backyard. These Florida summer storms are legendary, but for pool owners, they often bring a frustrating surprise the next morning: a pool that has gone from sparkling blue to a murky, swampy green.