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All the necessary nutrients for healthy plant growth are contained within the one bottle so there's no measuring and mixing of separate A&B parts
if temperature probe is in same solution as pH probe
The best way to use a tester is to measure the light levels when installing new lamps or lighting and then measure the light intensity thereafter on a regular basis until the lamps require replacing
It's an organic surfactant called Wet Betty and it does something every plant grower wants
VENTILATION
IWS Straight Piece x 20 Grow Systems Hydroponics Straight Piece x 20 Grow System All the necessary nutrients for20X STRAIGHT STRAIGHTS FOR IWS SYSTEM Plastic moulded IWS Straights made for easier fitting and sealing into the sealing gland. AT HYDROCULTURE UNIT 87 BARRY ST OLDHAM OL13NE 07545642528 OR 01616788711
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US$ 154.95
US$ 94.95