What salinity is everyone using?

I have a FOWLER with a single hermit (right now). Things seem to be good at 1.023.

 

whoo! big money! all that space for a single hermit?? lol... anyway, i'm trying to keep mine at 1.024... that seems to be the norm... oh, on a side note, does temperature have something to do with specific gravity? today i was doing a water change, and i put 2 gallons of water in a trash can (clean of course!) and a cup of instant ocean... the water was cold (i took my thermometer out of the tank and put it in the can to see how cold, it was about 50)... and i tested the SG, and it said 1.020 or maybe even lower, i can't exactly remember... oh, and i ran a powerhead in there, so the salt wouldn't just sink to the bottom....

 

Yes, temperature affects specific gravity. The colder the water, the higher the specific gravity (everything else being the same).

 

Yes, SAW39 is correct.

Comparing tank salinities without knowing temperature is meaningless.

Salinity, density, is correlated with temperature.

i.e. If the density reads 1.0250 at 68 degrees F - it will read 1.0274 if the temperature rises to 77 degrees F.

See chart http://www.msc.ucla.edu/oceanglobe/p...nsal_chart.pdf)

My tank seems to like 1.0245 at 78 degrees.

How you measure is also significant. If you do not have one of these, get one. Marine Depot has them at a good price--$49.99.

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Marine Depot Aquarium Refractometer - Marine Depot - Marine and Reef Aquarium Super Store

Bought mine long ago and has paid for itself over and over. (think we all got about the same time, Jason, et.al.)

Float types are just not that accurate and may give a false reading for something absolutly essential to the life of your tank inhabitants.

rgds,

OmarD

 

Both tanks, 1.026...8)

 

My tank will fluctuate due to evaporation, but I try to keep it at 1.024. My temp is steady at 78.8 degrees.

 

1.024 @ 79F... Cheers!

 

Ditto...leaves a little room for measuring error either way...:

 

1.026 for sure.
Use refractometer to make proper measurement.
Talking reef, need proper salinity for proper balance.

 

1.026 @ 80 F