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Stop Guessing What's In Your Glass

Every glass is a guess until you measure it. Dip Hydrova in, get your number in three seconds, and know exactly where your water stands

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Know the day your filter dies, not three months later

Most people have never checked. The ones who do are usually surprised, and not in the direction they expected

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What People Found When They Checked

Excellent

4.8

/ 5

based on 1479+ reviews

My filter was dead and I had no idea

Tap read 341. Filter jug read 336. That cartridge went in six weeks ago and the light is still green. Ordered a pack of replacements the same afternoon. Tap read 341. Filter jug read 336. That cartridge went in six weeks ago and the light is still green. Ordered a pack of replacements the same afternoon. Tap read 341. Filter jug read 336. That cartridge went in six weeks ago and the light is still green. Ordered a pack of replacements the same afternoon.

Settled an argument in our house

My wife swears by the bottled stuff. I tested it against the tap and the bottle came out higher. She still buys it but she's stopped telling me the tap's bad. My wife swears by the bottled stuff. I tested it against the tap and the bottle came out higher. She still buys it but she's stopped telling me the tap's bad. My wife swears by the bottled stuff. I tested it against the tap and the bottle came out higher. She still buys it but she's stopped telling me the tap's bad.

Finally know when to change the resin

Keep a reef tank and RO output crept from 0 to 4 without me noticing. Caught it before it went in the tank. Paid for itself immediately. Keep a reef tank and RO output crept from 0 to 4 without me noticing. Caught it before it went in the tank. Paid for itself immediately. Keep a reef tank and RO output crept from 0 to 4 without me noticing. Caught it before it went in the tank. Paid for itself immediately.

An eye opener

Read the screen fine even in a dim kitchen. Tested the tap, the jug, the bottled water in the fridge. Not what I expected on any of them. Read the screen fine even in a dim kitchen. Tested the tap, the jug, the bottled water in the fridge. Not what I expected on any of them. Read the screen fine even in a dim kitchen. Tested the tap, the jug, the bottled water in the fridge. Not what I expected on any of them.