Emerald Harvest pH Down 55 gal Master Controller This product is sold in

This product is sold in pairs

Pair the Bluelab pH Pen with the Bluelab Conductivity Pen (sold separately) for a complete picture of your nutrient solution

Glas-Col Thermocouple Type "J" Mini Plug

pack of 5 19

658Lm ±5% @AC277V

Emerald Harvest pH Down 55 gal Master Controller This product is sold inDescription Product Details Emerald Harvest pH Down 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 forestall nutrient