Hi and thanks for the quick reply. I am using Aqua Chem 1 " stabilized Tablets

active ingredients trichloro-s-triazinetrione available chlorine, 90%

then the shock is aqua chem shock plus which says sodium dichloro-s-triazinetrione 3.5 tsps per 500 gal. of water.

I will go to walmart probably on Mon to get the test kit. Will reply back. In the meantime, I hope my pool does not get covered in algea. Took 4 days to fill it, and would hate to have to drain it and start over.

It looks like red substance on the bottom is trying to form? I do not know... I went out and swept it.

Thanks again.