Balling method

[The Grizz]

Originally Posted by Delphinus

That doesn't make sense ... Only water can evaporate leaving the salts behind which would drive the SG up not down. If your SG is drifting down then something else is going on. Do you skim fairly wet maybe?

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Originally Posted by FragIt Dan

+1, although an undetected leak, or coral uptake of Ca, dKh and Mg would potentially drop the salinity. There was a recent post (I think maybe in TOTM??) about skimming very wet and having to add salt to ATO to make up for it. I'd want to figure out what's going on if I were you though.

It has been an issue since day one on this tank & I can't figure it out either. There are no leaks as I check weekly so the wife doesn't freak out. I do have several bad spots of salt creep that drive me crazy & will be addressing with the new tank set up. My skimmer does skim some what wet but I still haven't been able to get it tuned just right, it's a Deltec 702 external recuculating skimmer so not a cheap one.