We also use old fishtank water to fertilize our plants. Nitrogen!

You could also pee in a jug and dilute it with water.

I think the most important thing is the time between the tomato turns red and when you consume it. On a similar note, I find myself picking them when they are red or orange red, and waiting for them to turn red. I wonder if commercial farms pick them red and can them instantly, which is why canned tomato sauce tastes better than my tomato sauce.