Mixing Saltwater and getting it back into your tank....

[gregzz4]

You didn't mention how much water you're going to be mixing for your waterchanges (WCs)

I use a maxi-jet (MJ) 600 and 900, and a 100w heater in my 20g mixing tank. I prefer to have the new saltwater (NSW) the same temp as the DT before adding it
How much water I'm making dictates whether or not I run both powerheads or just one. One is on the bottom and the other half way up

I fill the NSW tank with RO water, turn on the pump and heater, and add the salt a few cups at a time and mix with a stick to disolve it
I think it was Myka who mentioned once about adding salt to cool water to avoid precipitation. I found this to be true and my new saltwater (NSW) doesn't get cloudy anymore as it did when I added the salt to warmed up water

I let it sit overnight before using it. The powerhead's agitation helps with pH as it's oxygenating the water
The next day, before using it, I test the specific gravity (SG) of the NSW, but don't bother testing the pH

I don't need to use a hose to add my NSW as I have my mixing tank higher than my sump. I installed a bulkhead in the bottom of the 20g and, when ready to add, I just open a valve and fill away
Makes water changes a breeze so I never dread them and they get done regularly

You don't need a heater. Up to you
A MJ can have a hose attached so after you use it for mixing, you could use it to pump the NSW
You can make it as simple or as complicated as you like. Just keep in mind as Coralgurl stated, make it as easy as possible so you don't put it off