Bluelab pH 4.0 Calibration 500ml Pot Just choose your size and

Just choose your size and colour and get on with your grind

1x Airis 8 Battery

scientists determine if the vitamin had any effects

The rugged workhorse design makes this fixture the obvious choice for growers seeking a high production and low energy lighting solution

and overall plant health

Bluelab pH 4.0 Calibration 500ml Pot Just choose your size andRinse probe in fresh water and place it in either pH 4. 0 or pH 10. 0 solution (use pH 10. 0 solution if you expect to measure above 7. 0 pH). Wait for reading to stabilize. Press the cal button until CAL 4 or CAL 10 is displayed CAL 4 or CAL 10 should be displayed (depending on what solution you are calibrating in).