How do you measure specific gravity?

[tike]

Wow! This is an O.G. thread!:lol:

 

[KrautBurner]

yeah,

I went thru the whole "poll" section

 

[krisfal]

I use a refractometer for regular testing, but use the taste test right before adding to my tank-My RO/DI barrel and the barrel I mix SW in are the same color and I do not want to accidently add 30g of freshwater to my tank!