Sorry guys. Newby here. I just bought a house with an above ground 10,000 pool. Took the cover off and the waters green. Been throwing lithium cloride to to no avail. The PH seems to be a little low. All I have is the test strips (I know they suck). Advice on how to procede. (I know I need a drop based test kit.) Why won't my clorine stay? Thanks in advance.