Does salt gravity increase linearly?

Parsely

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Hi, currently setting up my first reef tank and I want to raise the salt level. It’s cycling currently and at 1.022 and I want it at 1.026. I am attempting to do the math of how much salt I should add in and had a quick question. Does the salt gravity increase linearly. For example if adding 0.5cups of salt per gallon makes the gravity 1.022 would 1 cup make 1.044, 1.5 cups make 1.066 etc.?
 
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Parsely

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Thanks guys, have that swingy arm hydrometer now but looks like I’ll have to buy a refractometer. Wish I didn’t waste money on the swingy arm
 

WVNed

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I made a 100 gallon stock tank of saltwater this morning. I have no idea how much water was actually in it or how much salt I added.

You get the hang of it with time.
 

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