Reserve from the case
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Nov 14 - Nov 19
Reserve from the case
Ships within 48 hours · Estimated delivery Nov 14 - Nov 19
see our Greenhouse Poly Measurement Guide
Use the tester kit to gauge proper CO2 level
We recommend you use 100g of bentonite Clay per lb
allowing you to power high-demand equipment without additional modules
HM Digital Replacement EC/TDS Sensor for HM-500 Waterdrop see our Greenhouse Poly MeasurementReplacement EC TDS sensor for HM 500 Measures Conductivity and TDS Measures Temperature 1 Year warranty HM Digital Item #SP C5
US$ 101.95
US$ 627.00
US$ 36.00
Pay in 4 interest-free payments of $12.49 Learn more