Thanks for all the replys. I think I am going to go with 3-4 lower wattage Stealth heaters. I have had good luck with them so far, knock on wood.
I like the pump idea I just don't have the room or the extra pump at this time, but I may look at this idea down the road for my new system.
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230 mixed reef / 230 gal sump/fuge
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