"Dosing" to increase salinity?

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legrunt

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After my debacle with the refractometer, I've got a lot of advice about topping up with seawater, water change and replace with seawater etc.
Yes, one of my old mistakes was simply dumping salt into the tank... Which i won't repeat.

But I'm just wondering... What's the reason i shouldn't just mix up a batch of super high salinity water and "dose" a few ml each day, much the same way as dosing alk or calcium?
 

Spare time

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I'd imagine becomes incredibly cost ineffective to use salt as a way to replace major elements. I'm sure there are other reasons but cost would be my main concern.
 
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legrunt

legrunt

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I'd imagine becomes incredibly cost ineffective to use salt as a way to replace major elements. I'm sure there are other reasons but cost would be my main concern.
No no i don't mean as a way to replenish lost elements... I mean as a way to increase salinity
 
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Randy Holmes-Farley

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No no i don't mean as a way to replenish lost elements... I mean as a way to increase salinity
If you try to make seawater or salt mix too concentrated, calcium carbonate will precipitate. Just use normal salinity.
 
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legrunt

legrunt

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What's your current salinity and your target?

You may get precipitation trying to mix too high of a salinity. You'll also be adding alk, ca, mg, and everything else that's in the salt at a higher concentration.
It was 1.020. target is 1.026.
After a few water changes and top ups, it's now 1.023
 

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No no i don't mean as a way to replenish lost elements... I mean as a way to increase salinity

Ah I understand. Personally I think it would be easier to just raise it slowly via small water changes. That way you are cleaning the tank at the same time.
 

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I had to raise my salinity a bit so I just took my ATO pump out of the RODI and placed it in mixed 35ppt saltwater. I checked the salinity often enough so that when I reached my desired level in the DT I moved my pump back to the RODI.
 
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