Very cool! Been thinking about making an arduino controller for a while; may have to jump in!
How did you encase the DS18B20 temp sensor for underwater use, or did you get the ready made one like this?
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120 gallon, coast to coast overflow w/beananimal overflow. Waveline DC 10000 II return pump, 40 gal sump, Octopus XS200 skimmer, T5 lighting
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