Hanna Combo HI98129 pH/EC/TDS/Temperature Tester with Low Range EC Adapters Hanna pH 4 buffers contain

Hanna pH 4 buffers contain potassium hydrogen phthalate

at 58% RH — the drier of Boveda's two flower levels

Just add your own lighting

Refer to the Athena Feed Schedules for specific application recommendations

without photoxicity or visible residues

Hanna Combo HI98129 pH/EC/TDS/Temperature Tester with Low Range EC Adapters Hanna pH 4 buffers containThe HI 98129 Combo waterproof tester offer high accuracy pH, EC TDS and temperature measurements in a single tester! No more switching between meters for your routine measurements. The waterproof Combo (it even floats) has a large easy to read, dual level LCD and automatic shut off. pH and EC TDS readings are automatically compensated for the effects of temperature (ATC). This technologically advanced tester has a replaceable pH electrode cartridge