Bluelab Inline pH Probe (Replacement Probe Guardian Monitor In-Line) 600 Watt Double Ended HPS & MH Grow Lights Standard HPS lamps should only

Standard HPS lamps should only be used with standard or digital 230 Volt ballasts

preset vacuum controls

Using a clear dome with your seed tray will help maintain temperature and humidity

vines and roses

Mother Earth Coco + Perlite creates the perfect growing environment

Bluelab Inline pH Probe (Replacement Probe Guardian Monitor In-Line) 600 Watt Double Ended HPS & MH Grow Lights Standard HPS lamps should onlyThe Bluelab Inline pH Probe is a replacement probe for the Guardian Monitor In Line. Unfortunately, pH Probes do not last forever as they age through normal use and will eventually fail. With good care and use (keeping the probe tip wet and cleaning once a month), you will extend its life. Replace only the pH probe, not the whole meter!