hi been running my tank for 7 wks withliverock,inverts and 4 fish everything is doing well. used my hydrometer all this time with a salinty reading at the 1.023 mark. Well today i wanted to insure my investment for my fish one being a purple tang$$$ and bought a refractometer which gave me a different reading of 1.028 which is out of the window so to speak. that is quite a variance. What are the repercussions of the salinty being this high even though the fish are thriving, and how do i correct the salinty level in the proper way? Thanks
To correct the salinity remove a small amount of saltwater and replace with ro/di water or whatever fresh water you use during water changes. Be sure to change small amounts, a gallon or two at a time, and that should do the trick. Just check the salinity after replacing with fresh water.
That actually was about the difference in readings from my hydro to me refracto. I agree, remove some SW and replace with FW.
Mtlion is correct, I would only add don't do a few gallons at a time if you have a small tank.
What size tank do you have?
Age is relative, you are only as old as you act....of course, this works in reverse....
Agree with the others, but also want to add that 1.028 isn't THAT far above where it can be. Granted... FOWLRs often times run lower salinity, but having a salinity of 1.026 is pretty normal for a reef.
Better yet, get some 53.0 mS calibration fluid meant to calibrate electronic salinity meters. Using it, your refractometer should read 35 ppt, or a little higher than 1.026. That way, you're calibrating in the range you're normally measuring at.