Jack’s Professional 21-5-20 All Purpose LX Fertilizer 25lb Gardening 55-Gallon Professional Supply: Bulk format

55-Gallon Professional Supply: Bulk format sized for professional and large-scale grows running continuous bloom programs

12x root control discs

Or plumb a custom RO feed with it

and ideal for large installs

With HYGROZYME though

Jack’s Professional 21-5-20 All Purpose LX Fertilizer 25lb Gardening 55-Gallon Professional Supply: Bulk formatJacks Professional 21 5 20 All Purpose LX Fertilizer JR Peters Jacks 21 5 20 is a complete, potentially acidic formula engineered for moderate to high alkalinity water, keeping magnesium and phosphorus soluble for consistent uptake. As a lower phosphorus alternative to 20 10 20, it supports compact, vigorous growth without excessive P. The balanced profile is perfect for hydroponic systems, soilless mixes, and greenhouse crops where solution stability