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The poly stock tank I used had an NPT (National Pipe Thread) threaded aluminum insert in the drain hole. I used PVC fittings, which won’t react with the aluminum and seize, to connect a ball ...

An in-ground pool typically takes months to build and comes with a price tag of about $35,000, whereas stock tanks can be ready to go within a matter of hours and only cost a few thousand.

They include influencers Savannah McNeill and Casey Freeman, of the Instagram page Hey Wanderer, who have an 8-foot-diameter stock tank pool in their yard in Nashville, Tennessee.

The usefulness of stock-tank pools extends beyond happy hour; they are sturdier and more aesthetically pleasing alternatives to plastic kiddie pools.

Recently, stock tank pools -- large galvanized steel or plastic tubs originally designed for feeding livestock -- have made a rather large splash, becoming a popular alternative to traditional pools.

I went for the 8-foot tank that can fit six adults comfortably. A 6-foot tank would also work. All-in on the pool and supplies, I spent about $600.

The big picture: The Austin-based company, which ships stock tank pools starting at $3,450 nationwide, reports pool sales are up roughly 30% year-over-year.