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Old 11-22-2011, 08:09 AM   #11
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Sorry, SALT doesnt evaporate.

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Old 11-22-2011, 08:12 AM   #12
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My bet is user error in testing. Not pointing fingers but no other option seems logical. Keep monitoring with calibrated gear & you should be fine. If you find something else, share your info!

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Old 11-22-2011, 08:54 AM   #13
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I don't know if I missed it in another thread but have u looked around for any salt creep. That the only way your SG will drop. The reason I think it dropped to 1.021 is from filling so much ro/Di to top off and u need to give the tank a few hours to mix before u test the SG. I would suggest like sombody else did never top off more then a gallon a day. It needs to be countionus through the day to show no effect in your SG
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Old 11-22-2011, 12:07 PM   #14
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My top off container is filled with fresh RO/DI water (never had salt in there). I understand why it dropped to .021 but I had to get my tank level back up for the skimmer and hang on fuge. I've unplugged my ATO and mixed up 5 gallons of new salt water which I plan on slowly using to bring sg back up until this weekend when I can do a larger water change.

I have completely wiped down the tank and will be looking for any signs of salt creep over the next week or so while I'm going to be local. I also ordered glass tops to minimize evap when I travel for longer periods of time in the future.

I swear if I didn't know better I would say someone came in and borrowed 15 gallons of water from the tank.

I've been doing reef tanks for over 3 years now (with most of the same equipment) so while I'm not ruling out a possible "jack daniels" moment during my last measurement I'm still stumped.

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