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Okay, so I took 1 cup of pool water and mixed with 3 cups of tap water, and FINALLY reached 100 on the viewing tube. (And I always add the R-0013 up to the top line of the label on the mixing bottle, right?) So does that mean my CYA is roughly 400?!!?

Thanks, Cowboy Casey, and sorry for writing the same info. twice about how I came up with my numbers. I didn't realize you'd already responded on page 2 of the strand (didn't even know that there WAS a page 2!); obviously I need to work on my tech savvy as well as my pool savvy! I think we're...

Sure. When I pour the water from the mixing bottle into the viewing tube, it is still well below the 100 line when I stop seeing the black dot. (Which means that the CYA is ABOVE 100, right? Because to get to the smaller numbers on the tube, you'd have to fill with more water.) What I've been...

Sure. So, when I pour the pool water (or in this case, the diluted pool water) PLUS R-0013 mixture from the CYA mixing bottle into the viewing tube, well before it even reaches the 100 mark I am no longer able to see the black dot. So, what I've been doing - perhaps incorrectly - is adding the...

I diluted it 50% pool water and 50% tap, the reading came out almost exactly the same as when undiluted - about 140 (it doesn't even reach 100 on the black dot reading tube - it's about 40 below 100, hence 140) - then I multiplied by 2. What did I do wrong?

When I dilute the pool water with tap water and multiply the results by 2, I get about 280 CYA!!!!

Thank you! This is all very helpful. We have stopped using tabs altogether (to avoid adding even more CYA) and are just using liquid chlorine, but from reading other posts it sounds like CYA doesn't just "go away" quickly, so we do plan to drain. BUT... We've also read that it isn't a good...

Hi - I recently started one other post under "getting started", where I asked for advice regarding our high CYA and Calcium levels. I ordered the TF-100 test kit, and have been enjoying it, though I still have some questions about it as I try to test the water accurately. Our numbers seems so...

Thanks. To raise the chlorine, do I just keep dumping in jugs of liquid chlorine, and test after each one? How do I then lower the chlorine again to test for PH? I imagine I just stop adding chlorine and keep testing until the levels are down to 10. Is it safe to swim with chlorine between...

Thanks so much for all the advice. We swam on the 4th of July, added more liquid chlorine afterward, then I tested again today. I also called both the local water district and reverse osmosis company, and either way, it seems as if we'll need to wait until the fall and cooler temperatures to do...

Thanks so much for all the advice. We swam on the 4th of July, added more liquid chlorine afterward, then I tested again today. I also called both the local water district and reverse osmosis company, and either way, it seems as if we'll need to wait until the fall and cooler temperatures to do...

I got my test kit, and here are the results: FAS/DPD test: 5.5 and .5 TA: 240 (Unsure about this test; the one page instructions posted on this site says "repeat until color changes, and stops changing." The instructions that came with the kit say "continue until the color changes to red."...

Greetings - I'm new to this group. We have lived in our home for 5 years now - there was already a pool here - and we continue to use the same person to maintain it on a weekly basis. Last year he suggested that it might be a good idea to consider draining it this past spring, but California is...