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water smell

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hello, i am a plumber. a few months ago i read a thread where another plumber said that by turning up the temp on a water heater would fix the "rotten egg" smell that is common in some water heaters because of lack of use. i find this happens on small heaters more often also. i know the answer is to put in an aluminum anode rod in place of the factory rod. in my current problem i have the means to test the higher temp theory for a few weeks. does anyone know what temp is the minimum to accomplish this? also, will the higher temp clean the heater itself without me taking it out and cleaning it? thanks, budro