Lights & Covers

The technicians at Twin Pool and Spa attend seminars and in-depth training courses directly from the major pool equipment manufacturers to recognize solutions to your pool challenges. We work on all types of pools: chlorine, salt, and bromine. Brent and Derrick Marth have attained (CPO®) Certification: Certified Pool & Spa Operator® .  We service, repair and install pumps, filters, heaters, covers, plumbing, lights, chlorinators, tile, coping and more.


Rockville Pool Products & Installation



Halogen and incandescent bulbs are still out there, but are getting obsolete.  LED Color pool and spa lighting are the wave of the future in energy efficiency, lifetime value, quality of light and the ability to control it. Epoxy, Volts, Niches, conduits, controllers!  Brent, Derrick and the Twin Pool and Spa Team say: “Easy decision: go LED and never change a bulb again!”

The LED Energy Revolution

Energy and maintenance savings deliver a payback in less than three years.  LED lights save up to 84% on energy costs, and last 10 times longer than incandescent lights.  They’re the best way for environmentally-conscious pool owners to work less and save more dough.

12V Color LEDs.

Illuminate nearly any existing swimming pool environment with vibrant color. Lights are available in different colors, sizes and multiple brightness levels.  No need for old vanilla lighting at night in your pool!  Discover what a Light upgrade can do for your backyard environment.

12V White LEDs

Exceptionally bright. Remarkably efficient. UL listed to retrofit virtually any installed niche, allowing most lights to be upgraded.  The optimized LED and optic design delivers both extraordinary lumen per watt energy efficiency and associated long lifetime cost. 300W and 500W equivalent pool lights are the industry’s brightest based on each power rating*.  One light changes everything!

  • Vivid illumination
  • Consuming only 30 watts for pool lights and 18 watts for spa lights,
  • Color-changing LED lights use significantly less energy than traditional incandescent and halogen pool lights.
  • Cool running LED lights are durable, solid-state technology with no internal filament to wear out.

Keep your swimmers safe.  Make your poolside evenings go from great to spectacular. Brent, Derrick and the Twin Pool and Spa Team can service, repair and install professional poolside lighting products from the major brands of Swimming pool lights in Montgomery County, Frederick, Howard County and Fairfax County.

Pentair® – Jandy® – StaRite® – Hayward® – Purex® and more!


Pool owners are concerned with conserving water, energy and money.  The factory-trained professionals of Twin Pools and Spa team have extensive experience with a variety of pool covers. A solid, reliable pool cover creates a barrier that blocks debris, keeps out curious kids. critters and unwanted visitors to prevent accidents. Make things easier for yourself with an automatic pool cover.  Add push-button convenience, albeit at a somewhat higher price point than a pool cover you have to wrangle with yourself.

Pool Cover Benefits

  • Safety for your famiily and pool experience
  • energy savings
  • Conserve water by reducing the amount of make-up water needed by 30%–50%
  • Reduce the pool’s chemical consumption by 35%–60%
  • Reduce cleaning time by keeping dirt and other debris out of the pool.
  • Extend the season!



In most situations, homeowners who purchase these types of pool covers want to close their swimming pool for the winter months, however, these covers can be used 365 days. Constructed of polyethylene fabrics, winter covers keep out extreme winter temperatures, precipitation, and winds that can lead to frost damage

  • prevent accidental drownings & add extra protection for kids, pets & neighbors
  • prevent debris, dirt, and leaves from entering the pool
  • blocks the sun’s UV rays to prevent algae growth
  • improves offseason pool appearance (Loop-Loc® offers 4 different colors)
  • requires anchor points to be present around your pool.


.FREE-FORM & ORGANIC:  Non-Rectangular Pool Covers

We compute the surface area of your pool, making an allowance for anchoring.  Then, carefully translate those measurements into a cover that perfectly conforms to the shape and features of your pool. The cost of installing a custom pool cover will depend on the size of your pool, cover type and the complexity of installation.


We Recommend Safe & Dependable Covers

You can find less expensive, less dependable and less safe vinyl materials to cover the pool.  Brent, Derrick and the Twin Pool and Spa Team have found better value and quality performance with the 100% polypropylene Loop-Loc® lines satisfying pool owners in Potomac, Great Falls, Frederick and Woodbine.

Safety covers are required to support at least 485 pounds (the weight of two average adults and a child) per 5 square feet per a safety standard set by the American Society for Testing and Materials (ASTM). Safety and surety are key ingredients in a Pool Cover conversation.  Call us: 301-655-9333.

Pool Closing Rockville


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