Yes you can use a 20A breaker for a plug, you just have to use an outlet that is also rated for 20A. I have several 20A outlets in my garage workshop and I have a 20A circuit powering multiple outlets for my reef tank. You need to use 12 ga wire for a 20A plug not the 14 ga that is used for a 15A, so you will not be able to just upgrade an existing circuit by swapping the plug and breaker. If you are planning to run a new circuit, then 20A is the way to go.
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I retired and got a fixed income but it's broke.
Ed
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50 gallon FOWLR, 10 gallon sump.
130 gallon reef, 20 gallon sump, 10 gallon refugium.
10 gallon quarantine.
60 gallon winter tank for pond fish.
300 gallon pond with waterfall.
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