As newbie.. first welcome to CR4, second.. you will find that many people are a bit short (lack patience) when it comes to the obvious, as you have already found out.
CR4 is not the "be all" and "end all" to your problem of lack of initiative when it comes to looking for the answer BEFORE you ask the forum.
I'll tell you what you are going to hear very shortly.. "if you managed to find CR4, then you should be able to "google" the answer to your problem".
Now you might say.. well if I can google it, why bother with this forum?
If you don't fully understand the answer you've found, then ask away... there are many folk here who will help you understand something, but they point blank refuse to do the work for you.
Now with all that said for your future reference... your pool.
Chemicals will not clean a pool dirtied by construction dust or flying bits... you will have to get a pool vac or some such thing. As for dosing it with chemicals....speak to a pool guy, who does it for a living, and watch out with the back flushing as the dirt etc, might wreck your pool filters. In the long run, its better to speak to a professional.. but you knew that already!
__________________
The square root of nothing is what you make it!