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I am using the TH-100 test kit and trying to follow the instructions on The Extended Test Kit Direction Post for the DPD test. I have the following questions: I seem to have no test cell with a 9ml mark. Am I missing something? Do I just use one of the cells and guess by getting close to the...

Just put batteries in my new Speed Stir. Indicator light comes on when I push the on switch but nothing else happens. Shouldn't this thing vibrate buzz or something? :(

Hi all, 1st post, I just ordered a Saltwater 8000 15 foot pool with the following: Hayward 1HP 2 speed cartridge filter, Hayward Aquatrol SWG. Plans are to install the pool with perlite backfill, foam base, pool cove, and liner pad under the 25 mil liner. Being a newbie I know nothing about...