PH Level

pH. potential of hydrogen or power of hydrogen; is a scale used to specify the acidity of an aqueous solution. Acidic solutions (solutions with higher concentrations of H⁺ ions) are measured to have lower pH values than basic or alkaline solutions. 

a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution. Pure water has a pH of 7, acid solutions have a pH less than 7, and alkaline solutions a pH greater than 7.

pH is an essential measurement to harvest healthy biofilm it is a central indicator. It is essential to test your pH, when starting the fermentation process.The recommended level is to aim for 3, with 2.5 - 4.2 being considered a safe range.  If the pH levels change drastically you can encounter issues such as Kahm yeast.

• How Often Should You Test The pH When harvesting Biofilm?

Some people recommend to test it daily in the process of making Kombucha but I am working on making Biofilm. From my experience I consider disrupting the ecosystem is not such a great idea. ***Please note, my ultimate goal is to create multiple sheets of Bacterial Cellulose and I make my batches in a space that is a lab more than a kitchen. If you are making Kombucha test is daily.

I got these PH strips and will update the different batches pH levels

https://www.chemworld.com/0-5-to-5-0-pH-Testing-Strips-p/phts-5.htm

See Kahm Yeast Post

https://scobyte.blogspot.com/2022/05/kahm-yeast.html