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No, I can not. But I can buy 2.5% and 5%, and according with Pool math it doesn't matter, they have the same effect.

Hi, Using Pool math to simulate the effects of adding bleach with various percentages is returning strange values. For example, to the amount of 1 liter of Bleach: Bleach percentage / Raise FC 0 to 5% / 4.2 6% / 4.7 7% / 6.5 8% / 6.5 9% / 7.7 10% / 7.7 11 to 100% / 9.6 From 11% to 100%...

Yes, I have access to plain bleach. But the concentration is very low, the max I found was 2.5%. Maybe I can find it more concentrated in specialized chemical stores. As I already have the poudered chlorines, I did not search much. Regarding the tests, I'll use 10ml water to save reagents...

Hi folks, My Taylor K-2006C Kit arrive yesterday (unfortunately the TF-100 cannot be send to Brazil), and I did a full test: FC: 1.2 CC: 0.6* pH: 7.4 TA: 90 CH: 375 CYA: 0** t: 28ºC CSI: -0.03 (I added 70g of Dichlor aiming rise the FC 3ppm.) * I'm using a magnetic stirrer, the solution...

Thank you very much!

Another question, does the "low ionic strength" pH electrode correctly work on the high ionic strength pool water?

Yes, the pH electrode was dry. I tried to calibrate it using pH buffers, after leaving it in a KCl solution overnight, without success. I must buy a new one. As you said that almost all pools have high ionic strength water, I'll buy the regular (less expensive) one. Regarding the others...

Hi! I have a pH meter that is not used in a long time. The brand/model is Denver Instrument UP-25: http://www.denverinstrument.com/denverusa/electrochemistry/UltraBasic_portable_meters.php Brochure: http://www.denverinstrument.com/denverusa/media/pdf/literature/ultrabasic.pdf Manual...

Thanks! I already read the ABCs and just updated my signature. Have a nice weekend!

Hello, I am from Brazil and in my house we have a little swimming pool. I´m starting to care of the water myself. Searching information on the Internet I found the TFP forum and spent some days reading it, learning a lot. Definitely the best resource around. Thanks for sharing the knowledge...