fish tank water looks rusty?

I got a new but little 10 gallon fish tank for Christmas. I got it all setup water, gravel, heater, power filter, some plastic plants and decoration stuff. My tap water smells horrible I wouldn't even drink it but I have softened water with through my water softener. Tap water if full of rust too.

I filled the tank with water from softened faucet and it's ran a couple days. I bought a 5 in 1 test kit and everything test's good except for I'm guessing the PH. It's a bit on the high side in the 8 - 8.4 range. My test goldfish don't seem to mind. It's only been about a week since I set it up but the water looks either like a really light tan or yellow. I can't see it having algae already with just two tiny goldfish.

Any ideas what I can do?

Thanks