💧
Testing
TDS Meter
A pocket-sized meter measuring total dissolved solids - essential for RO/DI water quality verification and shrimp keeping.
Price: Budget
For: Both Essential gear $15-$80
📖 Overview
A TDS pen measures dissolved solids in ppm. Freshwater from taps typically reads 100-500. RO/DI output should be 0-4 ppm. Shrimp keepers monitor TDS precisely (150-250 for Cherry, 100-150 for Crystal Red).
🛒 Buying Guide
HM Digital TDS-3 is the reference pocket model.