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you usually need additives to achieve desired levels for your plants
Two SunBlaster 24" 17 Watt 6400K Grow Lamps with Ballasts
ensuring the PRO White lining runs cooler compared to a standard Mylar tent
Grodan Gro-Block Improved GR5.6 Large with Hole, 3" x 3" x 4" (Case of 256) spl_spectrumking Important Warranty & Return InformationGrodan Gro Block Improved GR5. 6 Large with Hole, 3" x 3" x 4" (Case of 256) New and improved stone wool substrate with advanced wetting technology from Grodan Introducing Grodan Gro Blocks Improved, a product specifically engineered to deliver real results for your crops, developed by plant scientists, researchers, and top growers. The uniform distribution of water and nutrients throughout the block allows for more efficient use of the entire