Phosphoric acid H3PO4 30% (w/w) Food Grade
 
- pH <1
- To lower pH of nutrient solutions
- Ideal pH range for most crops is 5.5-6.5
 
General Guide: 1 drop of 30% (w/w) H3PO4 may lower pH of 1L tap water (pH 7.6) by 1.0-1.5
 
Also available at Shopee