2026-07-18 06:02:02 A DC chemist created a custom water filter. Could he sell it on ‘Shark Tank’? – NEW WTOP Skip to main content

A DC chemist created a custom water filter. Could he sell it on ‘Shark Tank’?

When Eric Roy pitched his water filter business, Hydroviv, to investors of ABC’s “Shark Tank,” they weren’t all sold. But the D.C. chemist didn’t need them all.

He came for Mark Cuban who, after challenging the entrepreneur’s plans for a potential investment, made an offer: $400,000 for a 20% stake — the same dollar amount Roy had sought, for a bigger stake than he’d planned to part with. He took it.

“Mark’s persona is, he’s the guy who sniffs out snake oil and technical fraud… and he didn’t find any,” Roy told me in an interview Monday. “He’s very authoritative, and he’s very credible in the technical space, so if he’s like, ‘Hey, this is technically feasible,’ then that’s some great validation for us.”

The District-based scientist presented his invention on Sunday’s episode of the hit reality series, a prime-time platform that has skyrocketed sales for a growing list of local startup founders. Roy now joins that roster, thanks to his product:…

Read the full story from the Washington Business Journal.

LIVE RESULTS: DC primary election 2026

Follow WTOP’s team coverage of the D.C. primary online, on air at 103.5 FM or on the WTOP News app. Primary election day marked the beginning of the biggest shake-up in D.C. politics in decades. During this election cycle, voters in the District chose a new mayor for the first time in 12 years, picked a new delegate to Congress after Eleanor Holmes Norton's 36-year run, selected an attorney general and new council members.
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