Testing My Tap Water Firt

[Fatlip]

Hello, I just received my Taylor TF-100 kit. I tested the water at the Kitchen tap to see how it reads, spa wont be here for 2 weeks. Any feed back on the results would be great.

Here they are: water temp was 68 degrees

FC = 1.0

CC= 2

TC= 3

PH= 7.5

T/A= 200

CH= 90

CYA= ? I ended up filling the cya tube all they up and never did see the black dot go away

Thanks,

Rick

[chem geek]

Rick,

There isn't usually any CYA in tap water so the sample would remain clear after mixing with the reagent. You normally wouldn't even bother testing tap water for CYA. The other numbers look fine though the higher TA will mean a tendency for the pH to rise so initially you'll be adding acid (or an acidic source of chlorine) more frequently until the TA gets lower. You can accelerate this process through a combination of aeration and acid addition at lower pH. You might increase the CH somewhat, probably to 150 ppm.

Having both FC and CC is a bit unusual. For water districts that use chlorine, you usually measure FC with little or no CC (unless the pipes are quite dirty with organic material). For water districts that have switched to using monochloramine, you usually measure no FC and some CC (usually around 1 ppm though can be up to 4 ppm). None of this is a problem and your initial chlorine additions to the spa should take care of getting rid of the CC.

You can read Nitro's Approach to Water Maintenance, Lowering Total Alkalinity, Chlorine Demand and Decontamination for more info.

Richard