Be careful removing the barnicles off the face of the transducer. Look online for the safest way to do it. In the past I have used an ultra fine grit sandpaper ( only sand in one direction, flow wise not port to starboard ) and lightly coat with a “transducer anti-fowling” paint. It is sold in a small white container, maybe 3 or 4 ounces and has a brush inside the cap. Good luck.
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