Our boat is moored in southern NH in relatively warm water (by NH standards). I haven't yet found a good transducer paint. This year, I used a spray-on Zinc paint by Petit and the knot meter wheel was still invaded by little wiggling creatures, requiring weekly cleaning. Can anyone recommend a good transducer paint?

Also, as a side point, our speed and depth sounder transducers are located in close proximity to each other. When I pull the paddle wheel and insert the plug, the in rushing water splashes onto the depth transducer and takes that out of action until it thoroughly dries. I've made a cover for it which will hopefully protect it from water intrusion.