I agree with the above two posts. Please research "fishless cycling". Not only is it much easier, but it is kinder on the fish and will ensure their safety. During the cycling process Ammonia and Nitrites will spike high, and can stay that way for a prolonged period before Nitrates colonize. When cycling with fish you need to have a liquid test kit and test *at least* daily for Ammonia, Nitrites, and Nitrates. Once things start to spike daily water changes are necessary, but your fish will still be exposed to them and thus uncomfortable.
Just my two cents.