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50 hertz or 60 hertz
a Bluelab pH Probe and a Bluelab Conductivity/Temperature Probe
They will now be rated at AHAM standards based on the recent US Department of Energy ruling
Discontinue fertilizer regime 2 – 3 days before harvest
Large and Small sizes
Emerald Harvest - Cal-Mag bark 50 hertz or 60 hertzKeep your plants productive and green with Cal Mag, a calcium magnesium supplement from Emerald Harvest. Containing top quality ingredients, Cal Mag is designed to nourish crops with extra calcium and magnesium and create the right conditions for abundant flowering and a heavy yield. This is especially important when growing in some media, such as coco coir, but any garden can benefit. Derived from calcium nitrate, magnesium, sulfate, calcium acetate,
US$ 79.99
US$ 162.00
US$ 132.00
US$ 72.00