Question
I have an aquarium with some rocks and substrate mixture, and about 15 small fishes.
The pH level of the water is always high (7.6 - 8), away from the recommended value for the fishes I have. I want to fix the pH level permanently; I don't want to just add chemical components for a temporary effect.
How can I permanently reduce the pH level?
Answer
You should consider adding some natural pH reducing element. Adding drift woods, indian almond or oak leaves will slowly leach tannins, which in turn will reduce the pH. If you have a planted tank, you can start injecting CO2 which will also lower the pH. Another option is to filter the water through peat moss or commercially available peat granules.
Answered By - fahad.hasan