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Old 04-06-2015, 11:26 PM   #1
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Salinity formula??? Help lol

Quick newbie question,
I have made up a 5 gallon bucket of water, it's a little too high in salinity its 1.026 and I need it to be 1.022, is there a formula to use to know how much water to add in order to achieve my desired salinity? I've already done a couple gallon water change in my 10g and I just need this water to match my current salinity in my tank before adding it.

I've found a few calculators online, but they for calculating water change based on the salinity being in the tank, not in the prepared water, if that makes sense.


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Old 04-07-2015, 01:12 AM   #2
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the formula is simple, add water and see the salinity...
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Old 04-07-2015, 01:38 AM   #3
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the formula is simple, add water and see the salinity...
haha +1 you really just have to go for it. A refractometer really helps with this part.
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Old 04-07-2015, 03:05 AM   #4
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1 gal of water will fix it.

Math love it.

Fresh is 1 and your mixed is 1.026. Ignore the 1 as it's the supliferous number. Heck, ignore the decimals too.
Now 26 divided by 5 gallons is about 5. So removing 1 gal mixed and adding 1 gal fresh willpower by about 5, giving about 1.021. But if you leave the water there and just add about a gal fresh, bingo. And, like they said, try it and see. Always best to err on the high side as lowering salinity is faster than adding more salt and redissolving it.


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Old 04-07-2015, 10:27 AM   #5
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1 gal of water will fix it.

Math love it.

Fresh is 1 and your mixed is 1.026. Ignore the 1 as it's the supliferous number. Heck, ignore the decimals too.
Now 26 divided by 5 gallons is about 5. So removing 1 gal mixed and adding 1 gal fresh willpower by about 5, giving about 1.021. But if you leave the water there and just add about a gal fresh, bingo. And, like they said, try it and see. Always best to err on the high side as lowering salinity is faster than adding more salt and redissolving it.


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Honestly, that made absolutely no sense haha!


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Old 04-07-2015, 10:48 AM   #6
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Just simply add some fresh water to the mix, like 1/3 the gallon and test it and see where it is. This will help you get a good feel of mixing your water together.
With that said, there isn't anything wrong with 1.026.
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Old 04-07-2015, 01:49 PM   #7
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1.026 is perfect that is the salinity of natural sea water
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Old 04-09-2015, 02:08 AM   #8
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1.026 is perfect that is the salinity of natural sea water

Or more correctly 1.026 is the salinity of tropical sea water where most of our fish come from. And therefor what we should aim for.
Salinity varies greatly around the world and is below 1.023 where I live.


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Old 04-09-2015, 02:59 PM   #9
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Thanks guys. I always feel like I'm messing it up. Is there a good range for salinity?


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Old 04-09-2015, 03:41 PM   #10
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imo 1.024 to 1.026
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