As an untended garden eventually returns to its wilderness roots, so too does an unkempt pool slowly transform into the hungry Charybdis it once was. Keep your pool tamed with today's Groupon: for $20, you get one month of chemical and filter cleaning service ($66.95, plus a $25 startup fee) from Splash Pool Service. This Groupon is good for at-home pool chemical and filter cleaning service throughout the Las Vegas metro area, and the service will take place over two sessions. The cost of additional replacement filter parts is not included.

Splash Pool Service keeps pools properly purified and prepped for ultra-clean swims and soaks. During a chemical and filter cleaning service, professional pool techs will calm your waters with all the necessary pH balancers, conditioners, and chlorine shocks to make your pool fizz with Old Faithful-esque enthusiasm. Cartridge filter systems will enjoy a complete cleaning and o-ring lubrication, and diatomaceous-earth filter systems will receive a backwashing and replacement of powders. At the end of the cleansing, formerly unattractive liquid cages will glow with chemical beauty, ready to receive any belly flop or triple back-flip can-opener combo without drenching the swimmer in slime.

Algae buildup can cause dirty water, pool staining, and, if left unchecked, a body of water that turns into a gelatinous blob and swallows your house. Ensure that your pool isn't plotting to ruin the next pool party by setting up an appointment with Splash Pool Service.

Algae-infested pools may require additional charges. Groupon users will automatically be enrolled in Splash Pool Service's month-to-month program. If you do not wish to continue with monthly services, you must call to cancel.