Growth Technology pH Down

Rated 5 out of 5 based on 1 customer rating

Price range: £6.45 through £17.95

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pH Down is really good for lowering the pH levels of your feeds. This is especially relevant when using alkaline extracted nutrients, the main culprit being most seaweed fertilisers.

Optimal pH Ranges:

Trichocereus (Most columnar cacti) – pH5.5 to pH6.5 (Slightly acidic)
Lophophora williamsii – pH7 to pH8 (Slightly basic)

Growth Technology pH Down

Growth Technology pH Down is a concentrated phosphoric acid (81%) that can be used to reduce the pH of almost any liquid it is added to.

When growing plants in hydroponics or aeroponics, it is necessary to keep the pH of your nutrient solution within a certain range.

Different plant species have different requirements, but in general, most plants like a pH range of 5.5 – 6.5. pH Down is added sparingly to nutrient solution to help keep the acidity within this range.

KEY FEATURES

Reduces the pH of nutrient solution
Highly concentrated – 81% Phosphoric Acid
Phosphoric Acid – one of the best and most stable pH down adjusters
Corrosive – requires careful handling

Weight	0.5 kg

1 review for Growth Technology pH Down

GammaGoblin

Rated 5 out of 5

21/08/2026

Invaluable

One of the best purchases I've made this year. I discovered that my fert mix was very alkaline. This stuff is a game changer for getting the right aci...More
One of the best purchases I've made this year. I discovered that my fert mix was very alkaline. This stuff is a game changer for getting the right acidity balance on more alkaline feeds. I've had incredible performance in my feed's impact since adding this to the mix. Most of the growth tech PH down on the market is now 30%. At the point of writing, this is the original 81% - the real McCoy.

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All plants sold are strictly for garden / ornamental purposes, not for human consumption. We are here to cultivate these beautiful plants and spread them as far as we can, nothing outside of growing (all things related to growing) will be tollerated.