Growlink Terralink Substrate Sensor Humidity Control No vacuum is required

No vacuum is required

Color: Black w/ Green Guide Markings

Skim off the floating granules once this time has passed

It is the economy pick in the GrowoniX carbon line

Neither helps if the container is far too big for either

Growlink Terralink Substrate Sensor Humidity Control No vacuum is requiredReading the Root Zone with the Growlink TerraLINK Substrate Sensor The Growlink TerraLINK Substrate Sensor reads volumetric water content, bulk EC, and root zone temperature directly inside coco or rockwool. The probe runs as a TDR substrate probe Time Domain Reflectometry so EC drift doesn't corrupt the VWC number during aggressive drybacks. VWC reads 0. 01. 0 m m at 0. 02 from 053% and 0. 04 above. Bulk EC spans 020,000 S cm at (5% + 10 S cm) up to