Andy, I think you may find you have heat issues, depending on the ambient temperature of the tank room. Sudbury can get quite hot, IIRC, and if the room it's in gets hot, you'll certainly need to do something. A chiller is a good option.
I (hopefully) will be adding a chiller next year. It will be a 1/4hp for a 155g tank with 75g sump.
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Brad
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