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Soil/Soilless Our best results are seen in a soil or soilless media with freshly mixed nutrients. Silicic acid is by nature very unstable and quickly polymerizes or reacts with other compounds into unavailable forms. Mix fresh nutrients and feed within a couple days for the most profound effect...

To clear up confusion here are OSA/28 retail prices 8oz $90 Mixes up to 400 gallons 16oz $170 Mixes up to 800 gallons 32oz $300 Mixes up to 1,600 gallons 1 gal $1,100 Mixes up to 6,400 gallons 5 gal $4,600 Mixes up to 32,000 gallons If you are a retail store or...