I never measure, just throw it in and top it up until I hit 1.025 on the refractometer.

I do mine by weight 1.5 pounds of IO to 5 gallons water. you will need 19.5 pounds of IO salt.

Bill

Thanks to everyone for their help. Finally I can get my tank up and running.

I took a container that was about the right size for the volume of water I wanted and threw that salt filled up to the top into the bin. Then filled it with water until I hit the right salinity. Put a mark on the bin and now I just fill the bin with water to the line and throw the salt in from the container and it is the same always.
makes changing the water a bit smoother.

You use a Measuring Cup. 1 cup is a standard unit of measure. they make measuring cups in 1/4,1/3, 1/2, 1 cup measurements.

That was a painful thread to read

Tell me about it!! I'm a Chef by trade and I think a little bit of my brain exploded reading that. My wife is wondering why I'm yelling at the computer "A Cup Is A Cup!!!"

Colin

Haha
http://www.youtube.com/watch?v=aX6XMIldkRU
No, a proof is a proof. What kind of a proof? It's a proof. A proof is a proof, and when you have a good proof, it's because it's proven

Ok it's good to know I'm not the only one who temporarily thought about gouging out my eyes with an algae scraper after reading that.

I did not read the whole thing I just gave my answer 1.5 pounds makes 5g water.

Bill