What to add to keep pH between 7.0 and 7.4?

Answer 1

If PH is above or below than you have to add an alkali or acid.

eg If you had PH 3.2 that's a very high acid so you would add an alkali to neutralise it back to 7.0 - 7.4!

I hope this helps!

Answer 2

To keep pH between 7.0 and 7.4, you can add alkaline substances like baking soda or crushed coral if pH is too low, or acidic substances like vinegar or peat moss if pH is too high. Regular water testing and gradual adjustments are recommended to avoid sudden fluctuations in pH levels, which can stress aquatic life.