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Liquid Black Crystal from Dry Flower Products assists in increasing the ion exchange across the root membrane, improving the plants ability to absorb nutrients. Liquid Black Crystal is most effective when it is applied to the root zone of a plant; it must be put into your reservoir or used as a substrate drench. DO NOT foliar spray this product directly onto leaf tissue.
These reusable trays are built tough for long lasting durability! They are injection molded, where as most 10 x 20 trays are vacuum formed. They are four times the thickness of regular 10 x 20 trays. No need to use multiple trays to gain strength when one quad thick tray will do the trick. The tray insert has a perforated bottom for easy drainage.
