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July 17, 2016
Heat Loss Prevention: Solar Blankets or Liquid Pool Covers?
When I think about heating an outdoor swimming pool, the first method that comes to mind is a solar blanket, or solid cover. Usually, this means a large blue bubble wrap sheet that covers the entire surface of your pool, and is stored on a reel when the pool is in use. However, did you know there is another option to help keep the heat in your pool? Let’s take a look at two of the most common, but different options.
 
A solar blanket retains heat, and radiates the heat to the pool water when the sun is shining. When purchasing a solar blanket, you have several options you can choose from including, but not limited to size, shape, colour, density, and type of material. With the array of sizes and shapes, there will always be something that will fit your pool almost perfectly or, in some cases, after a little trimming. All colour options are equally effective, so the choice of colour is ultimately based on the pool owner’s preference. The density of the cover will usually determine the life expectancy of the cover.   
 
Solar blankets can help protect your pool water from debris that could blow in on a windy day; however, solar blankets can also become a breeding ground for algae if left on for too long in the heat and humidity. Below, are a list of some of the advantages and disadvantages of solar blanket heating options.
 
ADVANTAGES
  • Solar blankets have an insulating quality (provided by the air pockets that make them up) that liquid covers do not.
  • Can help prevent some debris from entering the pool 
 
DISADVANTAGES
  • Solar Blankets don’t last long. After approximately 3 seasons, the blanket will need to be replaced.
  • Labour intensive (If you do not have a reel for your solar blanket, you need two sets of hands to lift and fold the blanket before and after pool use) 
  • Solar blankets are not aesthetically pleasing. 
  • They can be very dangerous if trapped underneath. 
  • Not environmentally friendly. Did you know you can make tens of thousands of sandwich bags from the material used in a solar blanket?  Process to manufacture uses oil to produce the plastic.
  • Although a solar blanket will prevent some debris from entering the pool, most of it ends up in the pool when you take the cover off. 
Liquid covers reduce heat loss in your swimming pool by reducing evaporation of water from the surface. There are a number of liquid pool covers currently on the market by many different manufacturers. However, one thing that seems to be consistent throughout the market is the environmentally friendly factor. Liquid pool covers are usually biodegradable and made with an alcohol based product, which won’t harm your pools chemistry when used in the correct dosage. Most importantly, liquid pool covers are safe for your family, and even your four legged friends!
 
The ingredients used to form a liquid pool cover are not the only safety feature. When considering safety, liquid pool covers are by far the safer option in comparison to a solar blanket. If you have children or pets and use a solar blanket, there is a potential risk of entrapment. Once submerged, a solar blanket can be difficult to escape for people and animals of all sizes. A liquid pol covers invisible film is impossible for something or someone to get caught underneath, eliminating the risk of entrapment entirely.
 
When taking operation into account, liquid pool covers have their disadvantages as well. Since the liquid is a thin layer, it can be disturbed by movement in the water and from wind. The liquid pool cover will only resume its total pool coverage once the water movement has stopped.
 
The convenience of a liquid pool cover is another benefit. There is no labour required to use this product. On top of that, how many times have you thought to yourself, “I’d like to go for a swim”, only to realize that your solar blanket is on and to go swimming, you not only have to find another set of hands, but you also have to remove it? Sometimes, going for a swim isn’t really worth the effort. A huge benefit of a liquid pool cover is the immediacy. Do you want to swim right now? Great! With a liquid pool cover all it takes is a big jump and you are swimming, without the worry of lugging that large wet plastic tarp off of your pool. Below, are a list of some of the advantages and disadvantages of liquid pool covers.
 
ADVANTAGES
  • The danger of entrapment is eliminated with the use of a liquid pool cover
  • There is no labour requirement
  • No need to worry about replacement covers
  • Non-toxic
  • Very aesthetically pleasing. The cover is completely transparent, and invisible to the naked eye. Swimmers won’t even know it is being used.
  • Environmentally friendly and biodegradable

DISADVANTAGES
  • Must purchase the product
  • Not suitable for disturbed water
  • Will not stop debris from entering the pool 

Solar blankets and liquid pool covers both have their benefits, but they also have their downfalls. They are both effective at preventing heat loss from your pool, however, there are some differences. After considering all of the factors for each option, and weighing them against some of your needs you can determine the benefits you value the most, which in the end, will help you make a decision. 

Amanda Trapp
Service Consultant
With several years of experience in the aquatic industry, Amanda applies her wide range of skills and knowledge to answer technical questions and address aquatic issues promptly and accurately. In addition to her role as a Service Consultant, Amanda is also the in-house CPO and PPO course coordinator at Acapulco Pools.
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