Emerald Harvest pH Up, 1 qt Hygrometer Color: Black

Color: Black

These filters also feature superior two-stage air filtration design: air is filtered once as it enters the filter

GROW1 Indoor & Outdoor Temperature And Humidity Hygrometer w/ Probe

Reinforced plastic corners for higher durability

Outer Dimensions: 1''

Emerald Harvest pH Up, 1 qt Hygrometer Color: BlackEmerald Harvest pH Up, 1 qt Product Details Emerald Harvest pH Up pH up and pH down: Keep the nutrient solution and the growing medium in the sweet spot (pH 5. 56. 5) for optimal nutrient uptake and no nutrient deficiencies. pH Up and Down are buffers composed of a weak base (Up) and weak acid (Down) designed to correct pH imbalances. pH Up and pH Down adjust the pH for optimal nutrient uptake and stable beneficial bacteria colonies, and they