Pond Boss Forums INTRO Questions & Observations Secchi Disk

I use an 8" circle of black plastic mud flap with alternate quadrants covered with white electrical tape. It is mounted on an old broom stick with tape marking off every 3".

Since most of us use different techniques and eyes to measure secchi depths I think internal consistency wrt what you use and how you do it are more important than worrying about what exact object you submerge.