If you found yourself scouring the internet in search of an inflatable pool last spring, only to come up empty-handed, you had company. According to Sabeena Hickman, president and chief executive of the Pool & Hot Tub Alliance, pool sales skyrocketed as Americans faced a quarantined season at home.

Based on permit numbers, 94,000 new in-ground residential pools will be built by the close of 2020, an increase of almost 21% from 2019. The demand for hot tubs is even more appreciable: Numbers are up 400% this year from last, according to Hickman, and hot tubs are largely backlogged six months.

A dearth of conventional pools has brought a new type of soaking apparatus to the forefront, aided by social media: the stock tank pool. Crafted from a galvanized metal tank traditionally used as a feed trough for farm animals, a stock tank pool can be assembled in a day with a few DIY items that can be found at most hardware stores. With cold weather here, and states implementing more lockdowns, some water lovers are opting for the next best thing: the make-your-own hot tub.

According to Ben Uyeda, designer and co-founder of HomeMade Modern, an online design source that publishes instructions for home furnishings and projects, the DIY hot tub moment has definitely arrived. Uyeda’s videos detailing how to make your own hot tub have received millions of views. His first video featured a wood-burning heater, and his second, more user-friendly iteration included a heater made out of a propane tank.

“Every time we’ve done a hot tub-related project like this — in a scrappy vein — the thumbnails for it have just generated massive amounts of clicks,” he said.

The popularity of the hot tub videos reflects both the zeitgeist and this particular moment of the pandemic, Uyeda said. “You start with the essentials, and then you add things for efficiency.” He said people are now more likely to take up DIY projects that are lifestyle upgrades, unlike early in the pandemic, when they sought remedies for immediate problems.

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For Andrew Rowland and Caitlin Wallace-Rowland, who live in New Orleans, the recent addition of a stock tank hot tub was a luxury that followed a long list of home renovations.

“We kind of renovated our entire front and backyards, and then we were sort of running out of activities,” Wallace-Rowland said. After taking numerous weekend trips to the Mississippi coast so that their 2-year-old daughter, Laurel, could swim, they decided a pool was the next project to tackle.

In September, they fashioned what is now their hot tub out of a galvanized stock tank, with a heating apparatus configured from a propane tank. Wallace-Rowland, an artist and textile designer, planned where the pool would go and designed a landscaping scheme for it. Rowland, a director of system operations for a charter school, assumed the task of building the actual tub, which he described as “a very peaceful install.” The result is a tub that suits their petite yard and allows for year-round enjoyment.

Sara Haddox installed a stock tank hot tub at her Llano, Texas, home, which she largely rents out on Airbnb, in September as well.

“My husband went on a big hunting trip, and while he was gone, I was bored, so I decided to go ahead and bring the hot tub idea to life,” Haddox said.

Calling upon her degree in construction science, Haddox, who manages her family’s rental property, created an insulated stock tank hot tub with an electric heater (rather than a propane one) so that it reaches a higher temperature and stays hotter for a longer time.

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Her initial inspiration, she said, came from Pinterest and Instagram, where people had posted photos of stock tank tubs in stunning settings.

“I just loved these shots of these, like, isolated tubs, where you could just, you know, be in nature and just see forever and just enjoy being outside in a new way,” she said. “Those pictures really sunk in.”

She had considered building a tub for years, she said, but the events of 2020 forced her hand.

A hot tub began as a hot-weather pool project for E. Spencer Schubert. A sculptor in Kansas City, Missouri, Schubert decided to add a stock tank pool to his property at the start of the pandemic to make up for his family’s lost summer. He and his wife, Ryann, rented an excavator and installed an 8-foot stock tank pool with surrounding decking. As for converting the pool into a hot tub, that was “just the next iteration,” Schubert said.

The stock tank is now heated with a propane heater, and Schubert has converted the yard into a multiseason oasis, with a fire pit and “circus lights.”

“During the reasonable temperature part of the year, the place of the house that we use the most is the backyard,” he said.

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Although the temperature of the tub reaches about 90 degrees, Schubert said Missouri’s cold winters will likely limit their use of it in February. Nonetheless, the DIY hot tub will lengthen the life of the Schubert family’s pool season.

The stock tank pool rose in popularity early in the pandemic, said Jovana Johnson and Janice Luna, the owners of H20 Tank Avenue in Santa Clarita, California, which delivers stock tanks to customers in that state, Arizona and Nevada. When they started their company in May, Johnson and Luna immediately sold the 27 tanks they had ordered.

“We said: ‘OK, you know what? I think we’re going to order another set of tanks, but this time we were going to go distributor status,’ ” Johnson said. She and Luna placed their second order for 150 stock tanks, many of which sold on preorder via Instagram.

Now that the season has changed, they see potential in the market for tubs with heating options and have added a “tankuzzi” service to extend the stock pool season. They sell a tankless propane heater that increases the temperature of the water to 105 degrees.

“We’re fortunate here in Southern California to have very mild winters,” Luna said, which she said allows customers to use their pools and tubs all year long.

Johnson pointed out that a stock tank hot tub is flexible. (“If you decide to move, you can take it with you,” she said.) A traditional hot tub can weigh over 1 ton and often gets left behind in a move.

The aesthetic of the stock tank hot tub has developed its own unique following, too.

“It’s just a chic look,” Johnson said.

As for the rolling-up-the-shirt sleeves nature of the stock tank hot tub, Uyeda insists that building it yourself is part of the point.

“It’s a homemade-everything moment,” he said.