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Message: <blockquote data-quote="base_v5" data-source="post: 246641" data-attributes="member: 4696">It's a common misconception that air pumps put oxygen in the water. This is not really true. Oxygen is introduced to the water through agitation of the surface. If you have a water pump that is constantly moving the surface of the water, it will allow diffusion of oxygen into the livewell. The airpump does the same thing essentially. It is not the bubbles of oxygen putting oxygen in the water, it is the surface agitation when they pop and gurgle at the top. Basically, if you have good water movement and don't let the temps get high (80+) your fish will be fine, you don't need an airpump.With the transducer, I'm not sure if you mean installing it inside the boat? I can't imagine it would work correctly if it was trying to read through the hull of the boat. I would definitely mount it on the transom.Good luck with the mods, have fun doing it!</blockquote>