How to Make a Minecraft Auto-Filling Pool.

This uses pistons and redstone to make a pool you can cover up. The pool auto levels itself.

Repeat this step on both indented sides.g

Repeat this step on both indented sides.

Repeat this step on both indented sides.

Repeat this step on both indented sides. Both torches have a block over them.

Repeat this step on both indented sides.

Both sides should look like this. Repeaters should all be on 1 tick.

Redstone goes all around.

The block with no redstone on it, you must put it there, or crazy stuff will happen. EDIT- the repeater needs to face the other way.

Cover the mechanism with dirt so it matches ground level again. These two must be left uncovered.

The pistons are now holding wool, and are outlined with wool.

Place two layers of stone* around the pool *or whatever you use to make it.

Design the front of your pool. The chiseled block is showing you where to put the lever. --- The chiseled block is placed above the uncovered redstone- the one closest to surface.

Have water flow from the outline of the pool like in the picture. The water should all be source blocks.

Cover the water with slabs.

Place the lever and enjoy the pool. You can also create pools at ground level, you do the same process, but you dig your hole and place your pistons deeper ;)

In ground pool