Hi everyone - opening going the best ever thanks to BBB method! Numbers coming on line pretty quickly. Of course don't know CYA reading yet as I just added it 2 days ago so I am guessing a bit on the shock. So I added my last dose of shock (I know, noun not a verb...) about an hour ago and am getting ready to take my before reading for first OCLT. Do I keep filter running all night during test? Definitely need it as far as water not crystal clear but wanted test to be most accurate possible? Also, rain is forecast for tonight. Will that mess up my OCLT results? Thanks for all the help!