For those members and visitors who may not know this, Jason's Pool Calculator works offline, too, meaning you don't need to be connected to your ISP to use it. This is very helpful when your ISP is once again down - like RCN is, more often than not.
Open the Pool Calculator, then go to FILE/SAVE AS and save it to your desktop. Or right click and save it. It will run when you click on the Pool Calculator.html icon.