--- product_id: 597234180 title: "General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon" brand: "general hydroponics" price: "£144.19" currency: GBP in_stock: true category: "General Hydroponics" url: https://www.desertcart.co.uk/products/597234180-general-hydroponics-ph-down-liquid-premium-buffering-for-stability-1 store_origin: GB region: United Kingdom --- # 1-gallon liquid volume Food-grade phosphoric acid Precise pH control (5.5-6.5) General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon **Brand:** general hydroponics **Price:** £144.19 **Availability:** ✅ In Stock ## Summary > 🌿 Master your grow with precision pH control! ## Quick Answers - **What is this?** General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon by general hydroponics - **How much does it cost?** £144.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/597234180-general-hydroponics-ph-down-liquid-premium-buffering-for-stability-1) ## Best For - general hydroponics enthusiasts ## Why This Product - Trusted general hydroponics brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Generous Volume:** A full 1-gallon supply means fewer refills and uninterrupted growing cycles. - • **Food-Grade Safety:** Formulated with premium phosphoric acid, ensuring safe and reliable use in hydroponics. - • **Precision pH Tuning:** Easily adjust nutrient pH to the ideal 5.5-6.5 range for optimal plant health. - • **Consistent Stability:** Promotes long-lasting pH buffering to keep your nutrient solution balanced and thriving. - • **Trusted by Thousands:** Backed by 3,395+ reviews and a 4.7-star rating—join the hydroponic pros who rely on it. ## Overview General Hydroponics pH Down Liquid is a premium, food-grade phosphoric acid solution designed to lower and stabilize nutrient pH levels between 5.5 and 6.5. Packaged in a convenient 1-gallon liquid form, it ensures consistent buffering for hydroponic systems, trusted by thousands of growers worldwide for reliability and value. ## Description Buy General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000FG0F9U | | Brand Name | General Hydroponics | | Customer Reviews | 4.7 4.7 out of 5 stars (3,432) | | Global Trade Identification Number | 00793094015332 | | Item Form | Liquid | | Item Type Name | Premium Buffering For Stability | | Item Weight | 907 g | | Manufacturer | Hawthorne Hydroponics, LLC | | Manufacturer Part Number | HGC722125 | | Model Number | HGC722125 | | Number of Items | 1 | | UPC | 714863970218 793094015332 | | Unit Count | 3785.41 Milliliters | ## Product Details - **Brand:** General Hydroponics - **Global Trade Identification Number:** 00793094015332 - **Item form:** Liquid - **Item weight:** 907 g - **UPC:** 714863970218 793094015332 ## Images ![General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon - Image 1](https://m.media-amazon.com/images/I/61gukYk+JLL.jpg) ## Questions & Answers **Q: What is the amount per gallon mixing ratio?** A: I use up to 3-4ml per gallon sometimes, depending on my nutrients, water and stage of plant growth. It will vary depending on what you're growing and where your particular plant's needs fall on the nutrient/ph charts. For hydroponics/coir it is recommended by manufacturer to range between 5.5 and 6.5. **Q: can you list ingredients with %. Thank you!** A: exact amounts are a trade secret however the MSDS on this states:Phosphoric acid 10 - 30%Ammonium dihydrogenorthophosphate 5 - 10%Citric acid 5 - 10%in comparison the dyna-gro ph down has:Phosphoric Acid H3PO4 33%Nitric Acid HNO3 11.5%That being said there are benefits to some of these ingredients. N-NitrogenP-PhosphorusK-PotassiumPhosphoric acid provides: PAmmonium dihydrogenorthophosphate provides: N and PCitric acid: other than lowering ph, does nothing useful. made from oxygen and hydrogen not in any usable form as far as I can find.Nitric Acid provides: NOverall either product seems to provide similar benefits.Dyna-gro is half the cost. **Q: ingredients? Concentration?** A: It’s not organic if that’s what you mean ingredients. I haven’t used this in a long time. I want to say I’d use like 20ml for 5 gallons. I switched to another branf **Q: Is this safe for aquaponics systems?** A: I would think so. I use it to lower the pH of the water I use to water my plants sometimes, both inside and out. ## Frequently Bought Together - General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon - General Hydroponics CALiMAGic 1-0-0, Concentrated Blend Of Calcium & Magnesium, Secondary Nutrient Deficiencies Helps Prevent Blossom End Rot & Tip Burn, Clean, Soluble, 1-Gallon - General Hydroponics FloraBloom 0-5-4, Use With FloraMicro & FloraGro For A Tailor-Made Nutrient Mix, Provides Nutrients For Reproductive Growth, Ideal For Hydroponics, 1-Gallon --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/597234180-general-hydroponics-ph-down-liquid-premium-buffering-for-stability-1](https://www.desertcart.co.uk/products/597234180-general-hydroponics-ph-down-liquid-premium-buffering-for-stability-1) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-22*