 Evaporation
And you should be concerned about evaporation...
I went through 4 gallons of water in 36 hours... however... I've seen turned the fan off at 78 degrees... and will only turn it back on during light use...
This way I'm limiting it's use and while still keeping the temp. off the 84 degree mark I was once at...
Bottom line... the 20 dollar fan was a miracle...
A chillers, as it appears so far, is no longer on my priority list...
Now it's just getting down my nitrates... bought az-no3... today is day 2... I will post results so everyone knows about that product as well...
3reefers... GET A FAN!!!!!!!!!!!!!!
Ryan
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72 gallon bow front, aqua c urchin protein skimmer, wet/dry filtration, 90lbs lr, 70lb sand, 2 clown fish, yellow-head goby, yellow tang, flame angel, blue hippo, six-line wrasse, carpet anemone, cleaner shrimp, 4 mj1200's with red sea wavemaker, current sundial t5 ho lighting 216w, coralife 1/6 hp chiller | 
