Most aquarists that keeps ornamental fish in soft water need to be able to control the acidity of the water. As a general rule, ordinary tap water is on average alkaline with a pH above 7.5. Rainwater and osmosis water are most often pH neutral pH 7.0 and these water types must therefore be acidified.
For generations, aquarists have used peat, spagnum and acids for this purpose. Especially the use of concentrated citric acid, phosphoric or hydrochloric acid can be problematic with excessive fluctuations and precipitation of carbonates.
Peat and spagnum must be softened and inserted into the filter function and have a limited effect as it degrades. In addition, large amounts of tannins are released, which color the water a lot.
Oak Acids is a natural hardwood extract from Oak and Elm and therefore an natural organic acid. We have added a range of tannins to make it even more acidic.  
Oak Acids does not color the aquarium water and stably affects the pH at the correct dosage. The product also contains both humins and fulvics, which are important for fish metabolism.
Ordinary tap water with an average total hardness of gH 18 should be added 10 ml of Oak Acids per 100 liters of water to lower the pH by 0.25. Never lower your pH by more than 0.5 per day if you have fish in the aquarium.
Oak Acids is a natural acid, but you should use it with caution and follow the same precautions as with non-organic acid.

To learn more about the relationships between gH, kH and pH  Click here!
Oak Acids
9,20 EUR
#Aqua Wildlife on instagram