GroLine Electrode Storage Solution (230 mL) garden-accessories The ONA Block measures 3"

The ONA Block measures 3" x 3" and will fit in most places

and up/down arrows for adjusting relative humidity

Set point range: 10%-90% RH (in 1% increments)

When you dissolve Commercial Bloom into your water

The addition of the pump increases the efficiency of the recovery process and requires less dry ice

GroLine Electrode Storage Solution (230 mL) garden-accessories The ONA Block measures 3"HI70300 023 is a GroLine storage solution prepared with reagent grade chemicals that can be used to ensure optimum performance of your pH and ORP electrodes. It is necessary to store a pH electrode in a solution in order to keep the glass membrane of the pH electrode hydrated. Ideally a storage solution should be used; never store an electrode in distilled or deionized water. The Hanna Instruments storage solution is specifically formulated to