General Hydroponics PRO pH Up & Down | Non-Mineral, 2.5 to 55 Gallon – 2.5 Gallons / pH Up

How General Hydroponics Pro pH Keeps Recipes Clean Every mineral pH adjuster leaves something behind in the tank. Standard pH Down is usually phosphoric acid and standard pH Up is usually potassium hydroxide. Each correction nudges your phosphorus or potassium a little higher. In a hobby reservoir that drift barely registers. On a commercial fertigation line running a tuned recipe, it adds up across every tank you mix. Pro pH is GH's answer: a non-mineral formulation that moves pH without contributing fertilizer. Pro pH Down adds no phosphorus, nitrogen or sulfate, and Pro pH Up adds no potassium. Both carry a 0-0-0 HMIS rating and are non-caustic and non-corrosive, which changes how you handle them at the mixing station. They do not require hazmat shipping, unlike many mineral acids and hydroxides. The concentration is nearly three times the standard adjusters, so small additions do the work. The line comes in 2.5, 6 and 55 gallon containers, each in an Up and a Down. Dosing a Commercial pH Adjuster Without Overshooting Pro pH belongs where a commercial pH adjuster gets dosed by injector or mixed into large batch tanks. Add a small amount, mix thoroughly, and let the reading settle before adding more. Concentrated product overshoots quickly, and chasing a swing back and forth wastes both adjusters. Most crops sit comfortably between pH 5.5 and 6.5, and recirculating systems deserve a daily check. Because nothing mineral goes in, the feed chart you built is the feed chart the plants actually get. That consistency is the whole point of switching. The right amount depends on the alkalinity of your source water. Run a jar test on a known volume before you set an injector ratio. For a single tent or a couple of hobby reservoirs, the retail quart of standard pH Up or Down is the saner choice. Store containers sealed and out of direct sun, with Up and Down kept apart so nobody grabs the wrong one. Key Features Non-Mineral Formula: Moves pH without adding phosphorus, nitrogen, sulfate or potassium to the tank. 0-0-0 HMIS Rating: Scores zero for health, flammability and physical hazard, which makes daily handling far less fraught. Non-Caustic, Non-Corrosive: Kinder to tanks, fittings and hands than traditional mineral adjusters. Nearly Three Times Concentrated: Well above the standard GH adjusters, so small doses move the reading. Not Hazmat Listed: The line does not require hazmat shipping, unlike many mineral adjusters. Commercial Container Sizes: Up and Down each come in 2.5, 6 and 55 gallon containers for injector and batch-tank work. Technical Specifications Specification Value Product Line GH Pro pH Up and Pro pH Down Formula Non-mineral, non-caustic, non-corrosive Nutrient Contribution None — Down adds no P, N or sulfate; Up adds no K HMIS Rating 0-0-0 (health, flammability, physical hazard) Label Contents Pro pH Up: hydroxylated water. Pro pH Down: hydrogenated water Concentration Nearly 3x GH retail pH adjusters Hazmat Shipping Not required Target pH, Most Crops 5.5–6.5 Sizes 2.5 gal, 6 gal, 55 gal — Up and Down Part Numbers, Up HGC722004 (2.5 gal), HGC722000 (6 gal), HGC722001 (55 gal) Part Numbers, Down HGC722006 (2.5 gal), HGC722002 (6 gal), HGC722003 (55 gal) Compatible Systems Rockwool, coco, peat mixes, soil and water culture