Review on 📐 Accurate Measurement with General Tools REF113ATC Refractometer Compensation by Jermaine Chowdhury

As a newbie to coral and fish life, I ordered this instrument to measure the correct salt mix in my aquarium. So far it's been a great tool. A mixture of salt and water was present. My water's specific gravity was the same as the test done at my local fish shop. This allowed me to keep my seawater mixture right where it should be. I haven't had to recalibrate it since it came out of the shipping stuff. It worked exactly as stated in the description. I would recommend this instrument to anyone who needs to check the specific gravity of their aquarium.