Overall, this work provides the community with guidelines on how to achieve accurate (e.g., difference ~0.02 relative to validation samples), rapid (e.g., <1 minute per measurement) and long-term (e.g., 6-month) pH measurements, while balancing power requirements, by combining two complementary pH sensing technologies. We present a data correction method to account for sensor signal drift and demonstrate this in a challenging (i.e., significant biofouling) shallow water field deployment.