I made a water bucket and filled it with water for use on my farm, however once I set the water in the spot it disappeared...do i need to buy water(mc store), have a mod approve, or what? Same for lava?

The issue's been handled! Happy Mining! <object class="emojione" data="https://resources.enjin.com/1489581540/themes/core/images/emojione/svg/1f642.svg?0" type="image/svg+xml" standby=":)">:)</object>

Also if the water you took was from a protected area it will not work. You can fill the bucket, but when placing the water, it will disappear.