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pH- (powder) - 1kg

Regular price 8.99 EUR
Sale price 8.99 EUR Regular price
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Why use pH-

pH- lowers the basicity of your pool water. A good pH level helps reduce corrosion, optimizes the efficiency of disinfection products, and makes the water less aggressive to the skin and eyes.

Let our app guide you

You can download our app for free on the Apple Store (iOS) or Play Store (Android). Then, you can follow the recommendations from our recommendation engine to know when and how to use our chemicals.

How does it work?

pH indicates the concentration of hydrogen ions. A high pH is low in hydrogen ions. By releasing into your pool water, iopool's pH- increases the concentration of hydrogen ions and lowers the basicity of your pH.

Link to Wikipedia

Related blog articles

Discover tips, tricks, and useful information about pH on our blog.


  • High pH- concentration;
  • High-quality pH-;
  • Easy dissolution;
  • Quick action;
  • Treatment efficiency;
  • Low dust emission.

Usage tips

  • Activate your pool filtration;
  • Dilute pH- in a bucket of water;
  • Incorporate the water and pH- mixture into your pool.


  • Stabilize your pH before any disinfection treatment (chlorine and active oxygen);
  • pH modifiers are corrosive products that should be handled with care and not spilled on natural stones, clothing, or bare skin;
  • In the case of very basic water, proceed with correction over several days.
Property Description Quantity Unit
Weight and conditioning In powder, available in bucket (5 kg) or in jar (1 kg) 1 kg, 5 kg NA
Dosage Pool dependent. 150g for 10m³ for a pH increase of 0.2 NA NA
Frequency Pool dependent NA NA
Type of action Increase basicity NA NA

Customer Reviews

Based on 69 reviews
Frédéric Lapierre

Produit de qualité. Je recommande.

François Boivin
Bon produit

Juste une remarque, l’inscription PH- est écrite en petit contrairement à mes produits précédents. Il faut vraiment chercher l’indication du produit. Sinon 👍

Mathieu RAFFIN


georges dos santos

pH- (powder) - 5kg

Florent Agniel
Produit efficace

Produit efficace et qui se dissous rapidement dans l'eau lors de l'application

Chantal Leger
Sabotage par transporteur…

La poudre fuyait par un coté du colis j’ai refusé toute ma commande qui vous a été retournée

Bon produit, mais....

le produit est efficace, la correction est rapide mais lors de mes deux dernières commande les seaux sont arrivés exploser j'ai donc refusé les colis, je retente une 3 commande en espérant qu'il arrive en un seul morceaux et pas en plusieurs .