Jenn is right. You'll still have to cycle it, but if you take a lot of gravel from a cycled tank, it may cycle much faster. Try it. As for the water, a lot of people say that there are no nitro-bacteria in the water (only in the filter and on all surfaces in the tank). But, I guess you can try adding water as well if you want to, and see what happens. The most important thing is that your ammonia and nitrite should both equal 0 when your tank is cycled. Nitrate can be showing, but don't let it go over 20 ppm. Good luck
