
This tool is a must have for any reef aquarium. However, this particular model requires frequent fine-tuning. You will need a gallon of distilled water to calibrate frequently. It seems like every time I use it I find that my salinity is far from normal, but then I check the calibration and realize the instrument is something far from it. Now I don't think he calibrated it first.

π Accurate Salinity Refractometer for Seawater & Marine Aquariums: 0-100 PPT with Auto Temperature Compensation
3 Review

Fazhongfa Resin Aquarium Decorations: Add Style And Fun To Your Fish Tank With Castle, Robot Dog And Cave Hideout Ornament - Perfect For Small And Medium Betta Fish!
6 Review

π JOR Refractometer: Accurate Dual-Range Scale Device for Measuring Salinity and Specific Gravity in Saltwater Aquariums and Reef Tanks - No Batteries Needed!
3 Review

Create A Stunning Aquascape With Fresh Dwarf Sagittaria Subulata 3-Bunch Live Aquarium Plants By Greenpro
10 Review

Greenpro Micranthemum Monte Carlo: Live Large Pearl Grass Aquatic Plant In Tissue Culture Cup For Freshwater Fish Tanks And Aquariums
49 Review

Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
37 Review

π U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review

Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
55 Review