Calculation for raising salinity

kschweer

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Just curious if anyone knows a formula to use for raising salinity. By this I mean if the tanks at 33ppt a 10% water change of ??ppt will raise the salinity to 35ppt. Hope this makes sense. Thanks in advance!
 

Randy Holmes-Farley

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The final salinity is just the weighted average of the two water volumes.

So for your example:
0.9 x 33 + 0.1 x Y = 35

Y= 53 ppt

It is not a good idea to make 53 ppt seawater due to precipitation, so raising salinity is usually best done by topping off for evaporation with saltwater until your get to your goal. :)
 

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