Hallocool Salinity Refractometer for Marine Aquariums Keep your saltwater setup on track with a compact, reliable refractometer designed for dedicated marine fishkeeping

This instrument provides dual-scale readings in a single test: specific gravity (D20/20) from 1

000 to 1

070 and salinity in parts per thousand from 0 to 100‰

With two meaningful data points per sample, you can units quickly and choose the one that fits your routine—whether you maintain a reef, a nano tank, or a larger saltwater display

Two Scales, One Test Dual-scale results flexibility without adding steps to your workflow

The familiar SG range supports standard aquarium maintenance, while the PPT range helps interpret seawater measurements for precise salinity tweaks

A single sample yields two relevant data points, streamlining routine checks

Automatic Temperature Compensation (ATC) ATC helps account for ambient temperature so readings align more closely with actual water conditions

This feature is especially useful after water changes or when room temperatures shift, reducing the need for manual adjustments and helping you stay on course

Easy, Mess- Sampling Place 2–3 drops of sample on the prism, tilt toward a light source, and read directly through the eyepiece

Clear optics and a straightforward workflow minimize guesswork during busy days and support quick validation of your water parameters

Durable, Travel-Ready Design Built from aluminum and ABS rubber, the refractometer resists rust, staining, and abrasion

It arrives with a protective plastic case and practical extras—a mini screwdriver, a dropper, and a cleaning cloth—that support on-the-go testing and routine maintenance

What’s in the Box Aluminum and ABS refractometer body with ATC Plastic carrying case Mini screwdriver for calibration Dropper for sample application Cleaning cloth for optics Tips for Accurate Readings Calibrate with distilled water before first use Apply 2–3 drops and allow a moment for stabilization Keep the prism and cover clean between tests Use Case Scenarios I for reef tanks, marine vivariums, and saltwater pools where stable salinity matters

The device dependable readings in a compact package, making it a practical tool for hobbyists and professionals alike

FAQ Q: What scale ranges does this refractometer measure

A: It measures SG 1

000–1

070 and 0–100‰, giving two units from a single test

Q: Does it include automatic temperature compensation (ATC)

A: Yes

It features ATC for quicker, more stable readings