Here is the picture. I started to balance my own pool. But I have notice some dirt on the bottom of the pool. I usually just brush and suck it to the skimmer. But there is a area. I can't brush it up. Like stain.
Is that really common that we will always see the dirt on the bottom of the pool ? I just brush and vacuum yesterday. I have notice some dirt again. What cause it. How can I fix it ? I don't wann brush and vacuum the pool everyday though
![](http://i1152.photobucket.com/albums/p493/Kevindong/IMG_1666_zpsnjz3btbo.jpg)
Is that really common that we will always see the dirt on the bottom of the pool ? I just brush and vacuum yesterday. I have notice some dirt again. What cause it. How can I fix it ? I don't wann brush and vacuum the pool everyday though
![](http://i1152.photobucket.com/albums/p493/Kevindong/IMG_1666_zpsnjz3btbo.jpg)