I use 2 x 150w to keep my 50 gallon FOWLR tank up to temp. I had a single 250w in it, but it was not quite enough. I have only a single 65w PC light though, so not much heating from that. If you are running more lights, you may not need the bigger heaters.
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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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