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Two stainless pins for EC and TDS: Amperometric conductivity measured in the same body as the pH bulb
promoting rapid root development while minimizing stress
The 5500K color temperature sits in the daylight range that promotes strong vegetative structure — tight node spacing
The 25-pack scales a room or restocks worn heads in one go
respectively
Roots Organics Formula 707 -- 3 Cu. Ft. Bulbs (MH Two stainless pins for ECFormula 707 is a ready to use soil created for fast growing, heavy feeding plants. It was designed with greater water holding capacity, less perlite and pumice, and a light charge of nutrients for a good back bone but plenty of room for you to amend. Its base is peat moss, coco fiber, compost, perlite and pumice. The bag is a 30 gal. grow bag with just less than 20 gals. of the finest quality potting mix. Just poke holes in the bottom, cut off the top
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