Yes, I did shake it for over two minutes. It was a little workout.
The whole thing with the soap never crossed my mind, until I smelled it - that's when a red flag came up.
The water conditioner, I use a syringe to measure it, so it should be somehow accurate.
Thanks again for your input.
My goal is just to have a dense plated tank and some fish, I always enjoyed to watch fish when I was scuba diving in a nice lake.