Refractometer

[wrpeach33]

Is the ebay refractometers for $24 ok to buy ? Are they accurate?

Thanks

 

[sirevans reef]

Yep work's for me. It works way better than my instant ocean hydrometer.

 

[redfishbluefish]

Ebay (Chinese), refractometers are just fine….with two caviots:

1. Make sure it is for saltwater….35ppt or 1.026
2. Calibrate with 53.1mS.m fluid (not RO/DI)….HERE’s an example

 

[wrpeach33]

Thanks