7.87 Inch Plastic Secchi Disk Set Secchi Disc with Black and White Quadrants, Steel Cone, Holding Line and 100 ft Tape Measure for Clarity Measurements

Good

super , für jeden gewässerwart ein muss

Good quality

I liked the disc and the weight. Works fine. The tape measure is made of metal and will break in time. It would be smarter to have made this with a more durable fabric tape measure. Also after attaching the disc the measurement is out 30 cm. All measurements then need adjustments when recording the data.

1) Tape measure is only metric. 2) There is approximately 30 cm offset in reading because clip and stuff after the tape measure. 3) It came with a nut to tighten to disk; however there were not enough threads to get the nut on. I ended up buying a flat washer instead to fill the gap. The tape measure was difficult to use, got wet, and with 1) and 2) above didn't add value. Instead I tied on the included nylon rope with markings every 6". This is simple and easy to wind up and store when not using.

Bright color and balancing weight makes this easy to use