- Joined
- Jul 15, 2021
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- United Kingdom
Hi everyone, I’ve just bought a Red Sea nano max! I’m off to my LFS to buy some tmc dry rock over the weekend but I need to buy a salinity tester. They have a Red Sea refractometer or a digital hanna. Which would you recommend or is there a better one for sub £80. Thanks Fraser


digital Hanna salinity readers, so while that was my preference, I use a Milwaukee refractometer. Whatever you use, be sure to occasionally calibrate. Hanna comes with some initial solution (can't be used on refractometer) but refractometer solution is cheap (can't be used on Hanna). BTW Hanna customer service was outstanding


