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 ...

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 ...

Suggestions included turning the tanks into rainwater-collection systems, urban gardens and hot tubs. But Ronald Carlson, the sole remaining employee of Johnson & Carlson Tank Sales and Service Co ...

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 ...