Intense Nutrients pH Down Ultra – For Hydroponic Growing
Intense Nutrients pH Down Ultra – For Hydroponic Growing
£18.49 per litre · 5L
In stock
Couldn't load pickup availability
Share
Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup
- 14-day returns
- Price match promise
- Free Wembley store pickup
- Advice from the team: 020 3488 0419
Description
Fast, accurate pH correction for any medium
Intense Nutrients pH Down Ultra is a highly concentrated 81% phosphoric acid solution that brings a nutrient reservoir into range in a fraction of the dose of weaker pH adjusters, working equally well in hydro, coco and soil run-off.
Key Benefits
- 81% concentration – a small dose goes a long way compared with standard-strength pH down products.
- Works across all media – suitable for hydroponic reservoirs, coco and soil feeding alike.
- Fast-acting – lowers pH quickly and predictably with accurate dosing.
- Consistent results batch to batch – keeps feed pH stable throughout vegetative growth and flowering.
Nutrient uptake depends heavily on keeping reservoir or run-off pH in the correct window - drift outside that range locks out key elements even when the feed itself is balanced correctly. A concentrated, accurate pH down product like this makes it easy to correct pH precisely without diluting a reservoir with excess liquid.
How to Use
- Hydroponic reservoirs: add a small measured dose, mix thoroughly and retest before adding more - due to the high concentration, dose in small increments.
- Coco and soil: use to correct the pH of feed water before irrigation, targeting typical coco/soil ranges.
- General: always add to water rather than water to acid, and retest pH a few minutes after mixing as full reaction can take a short time.
Technical Specifications
- Active ingredient: phosphoric acid, 81% concentration
- Suitable for hydroponic, coco and soil systems

FREE Express Delivery on orders over £60. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.
