Pressure Wash

After all cleanup has been taken care of, you will want to pressure wash your pool.  This will help to remove all dirt, and cement film left behind.  A thin layer of dried cement will be left behind, called ‘surface cement’.  Be sure to spray all cracks between lights and other fixtures.

Acid Wash

Before you fill your pool, you will want to give it an acid wash.  The reason for doing this is to wash away any leftover grit, dust, and other debris left from the cement.

For the acid wash, you will need diluted Muriatic Acid, a sump pump, a scrub brush and a towel.

You will want to pour a small pool of water into the bottom of your Koi pond, and then mix the muriatic acid in with it.  You will then want to place the sump pump in the center of the mixture, and start spraying your pool walls.  You will notice a strong acid vapor, which is visible, and also very strong scented.  Don’t be alarmed by the loud hissing sound that is created either.  You will notice the pool of water starting to get very dark, which is the cement film that is left behind.  You will notice your walls becoming much cleaner, and looking much like you would originally expect.

After you have sprayed down your entire pond, you will then want to give one more final rinse across the entire surface of the Koi pond.  This will clear all acid that hasn’t washed down.  If you notice any spots that could still use some cleaning, take the scrub brush and town and scrub away the debris (you shouldn’t have a problem distinguishing between where the acid has worked, and where you will need to scrub, as the difference is very noticeable no matter what type of concrete fill you use).  You will also want to drain the small pool of mixture that you have created and dispose properly.

Filling with Water

Once you have drained your pond, you can add all drain covers and lights.  Once all drain covers and lights are installed, it is time to start filling your pond.  Be sure to fill your pond completely, and evenly to avoid any water ring stains on the pond walls.