Safety first Safety first Work from a stable platform, wear a life vest and make sure someone knows where you are. Only upload photos if you can do so without risking your safety and your phone. Find a spot where you can look into the water, away from sun reflections. Record Secchi depth, water colour and pH without sunglasses.
If you have pH paper, clip a new section into the provided clip and attach it to the disk.
Go to step 1