AquaLabo antifouling protection for OPTOD Plastic strainer

The antifouling protection consists of copper parts bonded to the OPTOD Plastic strainer to hold back biofouling. When the copper oxidises it loses effect and is replaced.

To replace it, remove the strainer from the sensor and take out the disc, scrape off the old copper with a nylon spatula and clean with soapy water or isopropyl alcohol, then fit the new copper. Never use an abrasive tool on the strainer.