Fish store water 48 ppt / 1.035

[Myka]

Originally Posted by syncro

Whoa. Thanks for the reminder Myka. I recalibrated my refractometer - it was reading +14 ppt.

The fish store water was probably near 34 ppt and my tank is running at 17 ppt. I now have a hyopsalinity problem. I figure I'll top off evaporation with 31 ppt water to raise the salinity.

Whoa! That's a biggie! Is it a reef or FOWLR? If it is a reef you should be keeping salinity at 1.025-6. Your idea to top off with saltwater is spot on, going up 14 ppt is huge, you should take at least a week to do this, but 10 days would be better.

[syncro]

Good idea mike. I'll keep my eye out for a hydrometer. Thanks for the info Myka. I'll raise the salinity slowly.

[Myka]

Ya, I use a hydrometer for day to day testing, and I calibrate with my refractometer once every 3 months or so. It does actually change over time.