Your Salinity

Justusfish · #1 03-28-2007, 04:19 AM

1.025, although it wavers on occasion

andresont · #2 03-28-2007, 04:29 AM

Mine is changes too, up and down (evaporation , water chnges etc) but i keep it at least 1.024 and max i had was 1.026

midgetwaiter · #3 03-28-2007, 06:34 AM

I pretty much treat anything between 1.023 and 1.026 as close enough. I have serious doubt that the hobby quality instruments are capable much more precision than that.

GrimReefer · #4 03-28-2007, 05:52 PM

Quote:

Originally Posted by midgetwaiter

I pretty much treat anything between 1.023 and 1.026 as close enough. I have serious doubt that the hobby quality instruments are capable much more precision than that.

you're just talking about hydrometers, right?

midgetwaiter · #5 03-29-2007, 08:03 AM

Quote:

Originally Posted by TheGrimReefer

you're just talking about hydrometers, right?

No refractometers too. If you take a look at what Steven Pro found when he tested a bunch of hydrometers recently (there's a link in the library section) while hydrometers certainly aren't good they don't deserve the reputation they have either. You could say that it's easier to get an accurate reading out of a refractometer but look at What Randy Holmes-Farley wrote in Reef Keeping a couple months ago. Calibrating a refractometer isn't a simple as most people think and if it is setup wrong then it isn't going to be any better.

I'm not saying that an accurate salinity measurement isn't important but whatever common method you use is prone to error. Given that determining if you really have yours at 1.023 or 1.025 is probably is either going to cost oodles of cash or involve some sort of voodoo.

GrimReefer · #6 03-29-2007, 02:59 PM

i didn't have any problem calibrating my refractometer. am i missing something? i'd be interested in the article you mentioned.

fishface · #7 03-29-2007, 03:29 PM

Quote:

Originally Posted by TheGrimReefer

i didn't have any problem calibrating my refractometer. am i missing something? i'd be interested in the article you mentioned.

http://www.reefkeeping.com/issues/2006-12/rhf/index.php

untamed · #8 02-24-2008, 05:12 AM

My target is to float my hydrometer at 1.025...but that hydrometer is calibrated to 60 degrees F, so my actual SpG isn't really 1.025. I would have to consult my conversion chart....

dareefguy · #9 02-24-2008, 05:37 AM

I have two digital pinpoint monitors in my sump. Use the second one to double check and I remove it to take to my mixing barrel to set the salinity for my water changes. But I have to mention that calibration is very important. I keep my salinity at 1.025 - 1.0255

View Poll Results: What's your specific gravity?
1.021	2	1.06%
1.022	6	3.17%
1.023	23	12.17%
1.024	52	27.51%
1.025	71	37.57%
1.026	35	18.52%
Voters: 189. You may not vote on this poll