Here's the most complicated part of the whole build, but it's super easy! All you need is 2 water source blocks (I sure hope you have an infinite water source by now) on either side of an Aqueous Accumulator (made with some iron, copper, tin, redstone, and glass). This automatically pumps infinite water up through the fluiduct (in this case copper and glass, or lead for opaque) to the water tank which looks like a simple oak plank block. Bonus, you can bucket water out of the tank for another infinite water source!
