Ask about Essentials LAB 30% pH- 5L
Essentials LAB 30% pH- is an acid solution (30% phosphoric acid) which can be used in small, controlled doses to lower the pH (increase acidity) of nutrient solutions. Mix thoroughly and measure with a calibrated pH meter to attain the desired pH reading. Ideal for adjusting large volumes of nutrient solution.
Key selling points:
- Concentrated acid solution
- Can adjust the pH of large volumes of nutrient solution
Technical Specifications:
- 30% phosphoric acid
- This product falls below the concentration threshold for Regulated Substances under The Control of Poisons and Explosives Precursors Regulations 2023.
- pH: <1.0
- Volume: 1 L
FAQs:
Q: How should I use Essentials LAB 30% pH- to adjust the pH level of my nutrient solution?
A: First, carefully check the pH of your nutrient solution. If the pH reading is too high, then the solution is not sufficiently acidic. Add a small, measured amount of Essentials LAB 30% pH- to your nutrient reservoir and mix thoroughly. Check the pH level again and note how much it has changed. You now know how much a certain dosage of Essentials LAB 30% pH- has lowered the pH in your reservoir, and from this you can judge how much more, if any, you need to add to achieve the desired pH level.
Q: The pH level of my solution is already low. What should I do?
A: If the pH is within the recommended range, you should do nothing. But if the pH is too low, then you should use Essentials LAB pH+ to adjust it to a higher level, within the recommended range.
Purchase this with…
09-410-022 - Essentials pH Meter - With Memory Function
09-420-070 - Essentials LAB pH+ 250ml
10-485-035 - 10ml Plastic Long Pipette - 1ml increments
DELIVERY
- Mainland UK delivery only
- Orders under £90: £8.35 shipping.
- Orders over £90: free shipping.
- Orders are usually dispatched within 1–2 working days and sent on a next working day service after dispatch.
- Please allow up to 5 working days during busy periods, bank holidays, courier delays, or stock delays.
- If an order is urgent, customers should contact us before ordering.
- No international shipping at the moment
RETURNS
- Unused and unopened items can be returned within 14 days of delivery, provided they are in the original packaging and suitable for resale.
- Customers are responsible for return postage unless the item is faulty or incorrect.
- Returns can be started from your customer account on Hydro Hub.


