Ummmm... i hate to burst your bubble but I think you might want to research some more on the bottled water. It's devoid of minerals that your plants and fish need. Please don't take my word for it but I'm pretty sure I've read that more than once here and elsewhere.
Your tap water should be fine with a really good water conditioner like Seachem Prime. Have you brought it to your LFS to have it tested?
And crushed coral would probably wreak havoc on your PH levels in a tank that small.
Other than that - your fish is a beauty.