Guest Post: Do Liquid Solar Covers Really Work?

My Experiment: Do Liquid Solar Covers Really Work?

I’ve been in the pool industry for many years and have sold my fair share of traditional solar covers throughout that time. When we started carrying the liquid solar cover in my store, I thought to myself, “this is the greatest thing ever!” I hated putting on and taking off MY solar cover on my 28 foot round above ground pool. It’s big, it’s bulky, it’s a flat-out pain in the... you know what.

Once we received the liquid solar covers, I put them right on the front counter and sold them to everyone. I mean, it’s a product that keeps the heat in your pool! It’s genius.

So for years, I sold these, but never used them on my own pool. That pool is long gone (due to my younger siblings attempting to ice skate on it during the winter), and I never got the chance to see if the liquid solar cover really worked.

The Idea

Last month, I recorded a podcast with Monique Nelson, marketing director and the main blogger here, about liquid solar covers. We mainly talked about the science behind the product and the benefits of using it.

After the interview Monique and I were chatting about a few things and we had an idea to do a small-scale experiment to prove that the liquid actually worked to reduce evaporation and increase the temperature of the water. She sent me out a couple of EcoSavrs™ and a bottle of HeatSavr™ for the experiment.

That weekend, I set out to conduct a visual experiment, in my pool-less backyard, to prove that liquid solar covers work!

The Experiment

For this project I needed a few supplies. I planned on filming the experiment so I needed to think visual. First, how can I show water evaporation on a small scale?

I went to a local restaurant and asked if I could borrow two clear containers that they use to making crispy and delicious hot wings. Sure enough, they had two 4-quart containers that were identical. However, I knew that the clear water in the clear containers would be hard to see on video, so I used blue food coloring to enhance the visual.

My plan was simple. Take two containers side by side, fill them with the same amount of water at the exact same temperature, and add a few drops of the HeatSavr™ liquid to only one of those containers. The other container would be left alone to evaporate.

I left the containers outside for 48 (really hot) hours. During the evening after the time had elapsed, I checked the evaporation levels. To be honest, they were not as significant as I thought, but when I measured the temperatures of both containers, the container with the HeatSavr liquid was 5 degrees warmer! I was impressed that in just 48 hours you could see that difference.

Also, I knew the video would be boring unless I added some sort of “fun.” So I went and bought myself a lab coat and fake horn-rimmed glasses to make me look a little more “official.”

I’m a beer homebrewer, so I already owned the erlenmeyer flask and beakers that I used in the beginning of the video (I was channeling my recent obsession with the cinematography of Breaking Bad).

All in all, I thought the video was a huge success. If I had the resources, I would love to take two identical 16’x32’ inground pools side-by-side and conduct the same experiment. Only this time, we could measure its effects with the filter system and other pool chemicals. Perhaps down the road.

The Video

Finally, here is the video I put together and sent to Monique. Hope you enjoy it.

The Testimonial

As a bonus, the good people at asked its Twitter and Facebook follower to film a video testimonial for a contest they are holding. I was sitting at my desk when I received the tweet, and it just so happened that I had a EcoSavr™ on my desk from when I was editing the video. I decided to create my own video for them, and as of this minute, I am the ONLY person to submit a video for their contest. They said I set the bar too high, whoops!

That $100 gift card for winning won’t do me any good in a pool-less backyard...
If you have any questions about the method to my madness, or general pool heating questions, please submit them in the comment section below.

Happy Swimming!

Matt Giovanisci is the creator of Swim University and has over 15 years of experience in the swimming pool and hot tub industry. He is also an award winning web designer and has been featured on Martha Stewart Radio as a pool & spa expert.  Follow Me On Twitter | Like Us On Facebook | Got Pinterest?


Wilson Grant - August 6th, 2012 at 3:04am

The video explains everything. I'm going to try the liquid solar cover.

Frenks - August 24th, 2012 at 8:00pm

Great post. I really enjoyed the video. Well-explained.

Chrysa - August 25th, 2012 at 5:57pm

Interesting! Then I guess I should use liquid solar cover for my pool from now on. Thanks for the new insight!

Name - September 4th, 2012 at 11:12pm

hi - what happens to the liquid solar cover when filter is running? I assume it gets sucked into skimmer and gets stuck in sand filter, which then clogs up sand filter or gets flushed out in backwash - correct?

Al Metty - October 18th, 2012 at 9:50pm

Trying to covince my property manager in Key West that we can limit the evaporation in a couple of pools but he is a hard sell. Can you point me to any tests that have been done by thrid parties or folks we can contact to discuss

Sunplay - March 4th, 2013 at 11:08am

Wow! I have never heard of liquid pool covers until now. This is something we'll have to consider.

Hot Tub Covers Calgary - August 6th, 2013 at 6:31am

Really very nice and useful post shared. Thanks for this.

L Bass - April 22nd, 2014 at 3:49pm

Can I use a liquid solar cover in addition to a regular solar cover on my pool?

Tony Kalkounis - June 16th, 2014 at 7:43pm

Should you turn motor to pool off to make planet for pool

Sharmin - February 24th, 2015 at 5:19pm

can you please name these third part sites that have done testing and why haven't you done and published your own?

michelle - May 5th, 2015 at 5:51pm

I want to know what about the bugs and leaves to stay out of the pool

Ted Thayer - June 12th, 2015 at 6:18pm

Hi! I just bought some of your product. Our pool water is rusty (well water) so we do tend to backwash the filter daily or every other day. This spews water out a pipe into the backyard. Will this practice require us to replenish the solar cover more often than once a month?

Ghlnk Pool Covers - September 22nd, 2015 at 12:32am

How Long Does Swimming Pool Solar Covers Last?

sherrie - November 21st, 2015 at 6:53am

does this product affect a salt water chlorine generator?

JD - January 17th, 2016 at 8:32pm

Can I use the liquid pool cover in conjunction with a traditional solar bubble blanket for even better results or will it stick to my blanket and get removed?

Julie Jones - July 22nd, 2016 at 10:27am

I live out in the country with a lot of trees, lot of leaves and falling debris. A lot! Will the liquid solar covers work with the plastic cover that came with my Intex pool? Or will that covers designed to block leaves and debris, also block the sun and cause the liquid solar products to not work?






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