By adding potash or bicab to the water.
Algae draws all available CO2 out of water, causing its pH to increase.
pH means power of hydrogen. So, an increase in no. of hydrogen will increase the pH.
The pH deccrease.
The increase in pH would be 2, as going from a pH of 1 to a pH of 3 represents a change of 2 pH units.
Increase pH (water) = 7 pH (KOH solution) is about 8 - 10
The solution become more and more alkaline and the pH increase.
The pH level must rise
Adding a base will make the pH go up (increasing of OH- ions concentration).
The pH increase with the help of an antacid.
The inflexion point
Adding a base the pH increases.
as co2 increase pH decreases