Ph of the water in a pond changes throughout the day. It is lowest in the early morning due to a buildup of carbon dioxide and highest in the afternoon when photosythesis is at it's highest. So measuring the Ph will not give you a good indication of fertility. Total Alkalinity is a chemical analysis that requires a test which is composed of several different steps.
Kits are available to measure alkalinity.
Ph of the water in a pond changes throughout the day. It is lowest in the early morning due to a buildup of carbon dioxide and highest in the afternoon when photosythesis is at it's highest. So measuring the Ph will not give you a good indication of fertility. Total Alkalinity is a chemical analysis that requires a test which is composed of several different steps. Kits are available to measure alkalinity.