How two float spa owners built a $500k/month cold plunge business

Executive overview

Two California float therapy business owners lost their income when COVID shut them down in 2020. They spotted a gap: cold plunge units started at $9,000, with almost no competition online. They built prototypes in a garage, sold to their existing customer list, and scaled to $3.5M in 12 months.

Own an underserved search term early, seed 10–20 trusted influencers with free units, and let warm referrals carry you up the chain.

From idea to first sales

• Both founders owned float therapy centres — they understood cold water therapy and had a customer list.
• Existing cold plunge units cost $9,000+; they targeted $3,000 and built the first units in a garage.
• Validated demand by emailing their existing float customers: two immediate buyers at $3,000 each.
• Ran a limited batch of 20 units, hand-delivered locally to stay close to early feedback.

SEO and paid acquisition

• Identified that nobody owned the search term "Cold Plunge" — it was a "barren wasteland."
• Secured coldplunge.com and saturated the site with the phrase; reached page one within a month organically.
• Held off on Google Ads for over a year; organic SEO drove the majority of early growth.
• When ads launched, they had few competitors and a price roughly half the nearest alternative.

Influencer strategy

• Targeted 10–20 people who already used cold therapy and shared the brand's values — not follower count alone.
• Sent free units in exchange for authentic, unscripted sharing; no mandatory post quotas.
• First major win: spotted Aubrey Marcus doing a cold plunge live on Instagram and commented offering an upgrade — he replied within two minutes.
• Each gifted unit became a referral node: they asked every recipient who else should get one, working up to Tony Hawk via Jason Ellis.
• The network effect made a small operation look ubiquitous.

Operations and growth stages

• Garage → back of a bike shop → 3,000 sq ft warehouse → larger commercial unit, all within roughly 12 months.
• Each space outgrown within weeks; moves were reactive but manageable due to proximity.
• Hiring driven by identifying tasks neither founder wanted to do, then finding someone for those.

Co-founder dynamic

• Mike handled product and fabrication; Ryan handled sales, marketing, and partnerships.
• Pre-existing six-year friendship meant shared values were already established before the business started.
• Previous collaboration on a charity campaign gave them a low-stakes trial run of working together.
• Speed was critical: Ryan credits Mike's bias for action with capturing the market window before competitors arrived.