the tanks are plastic, and sitting on top of each other, needless, to say you would not want to drill and more holes in the take to have a float level in there.
The fresh water tank is clear, so you can see the water like in it.
The poop tank, vent will smell a bit, when it gets full, as pump outs are at every gas dock.
Not really worth the electrical nightmare to hookup on a used boat.
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