









🌿 Unlock your garden’s full potential with precision pH mastery!
Humboldts Secret pH Down is a concentrated phosphoric acid solution designed to quickly and precisely lower pH in soil, coco, and hydroponic systems. By maintaining an optimal pH range of 5.5 to 6.5, it maximizes nutrient absorption, prevents deficiencies, and supports strong root and foliage development. This commercial-grade formula is up to 25% stronger than competitors, free from dyes and additives, and trusted by professional growers for consistent, reliable results across all growing mediums.






| Product Dimensions | 12.7 x 5.08 x 19.05 cm; 1.16 kg |
| Manufacturer | HS Supplies, LLC |
| Item model number | HS-PH-DOWN |
| ASIN | B0BW3G96VV |
Trustpilot
4 days ago
3 weeks ago
5 days ago
2 months ago