Growth Technology pH Down 5L — 81% Phosphoric Acid

Growth Technology pH Down 5L — Premium 81% Phosphoric Acid

Premium-grade pH Down solution at 81% food-grade phosphoric acid — lowers and maintains nutrient solution pH reliably. Every hydroponic grower needs this (or the equivalent) — tap water in the UK is typically pH 7.5-8.5, while plants want 5.5-6.5. pH Down is the standard corrective. The 5L size is the best-value commercial sizing for serious or repeat use.

Why growers choose Growth Technology pH Down:

• Premium 81% phosphoric acid formulation — food-grade, not industrial-grade
• Reliably lowers nutrient solution pH — fast-acting and stable
• 5L commercial size — best value per litre, months of use across multiple grows
• Standard across UK hydroponics — one of the most-used pH correction products in the industry
• Works with any nutrient brand — pH correction is universal, not brand-specific
• Essential for hydroponic growing — UK tap water's natural pH locks out nutrients; you must correct it

Who it's not for:

Handle with caution — this is a strong acid. Wear gloves and eye protection when decanting. Add a little at a time to your reservoir, wait a couple of minutes for it to mix, then re-test pH before adding more. For organic/soil growing, natural pH-adjustment approaches (citric acid, lemon juice) may be preferred. Keep out of reach of children and pets.

Available to collect from our Stone shop at Unit 24, Emerald Way, ST15 0SR — or ships the same working day from our UK warehouse. Not sure if this is the right fit? Give us a ring on 01785 556355 or email sales@roots2riches.com — we're growers ourselves, happy to help.