Calibration Buffer, pH 4.01 Hanna Pro Grow and Bio RHIZOTONIC and Bio

and Bio RHIZOTONIC and Bio BOOST organic supplements

Secure fit with double-barbed ends

This formula ensures optimum growth

Bloom Soil: Nitrogen 1

Probe Care Kit Conductivity

Calibration Buffer, pH 4.01 Hanna Pro Grow and Bio RHIZOTONIC and BioHI 7004 1L pH 4. 01 Calibration Solution (1 L), 1 bottle HI 7004 1L is a premium quality pH 4. 01 calibration solution that has been dyed red for easy buffer identification. Hanna calibration buffers have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution. Hannas line of calibration buffers have been specially formulated to have an expiration of 5 years from