Test results on new pool in Tucson

[Watermom]

An OTO/Phenol Red kit (yellow and red drops) is useful for quick daily checks. It is what I use most days and then use the K2006 once a week or so. An exception is of course, if I have need to shock the pool and need to be able to test higher than 5ppm of chlorine. In that case, the K2006 is needed.

[PoolDoc]

OTO is not super accurate, but it covers the range from 0 - 50 ppm, and it's pretty much goof proof. The FAS-DPD test covers the same range, but it *can* be screwed up. The DPD color match (K2005) covers the range from 0 - 5 ppm, (0 - 10 ppm claimed, but few people can read the difference between a 5 ppm red and a 10 ppm red!) and there are multiple ways it can go wrong.

[Wilco]

Good help, thx. Tested with kit (Taylor) after gallon of bleach last night and borax the day before. Now at 7.4-7.6 and cl is 5 ppm on Taylor, although correlates at 1-2 ppm on strip. Think I'm ok for a bit, but will get oto kit for use as well.

[PoolDoc]

If chlorine levels hold overnight, but disappear during the day . . . your CYA is low. If your CYA testing is not indicating this, please watch the CYA test videos linked from the testkit page: http://pool9.net/tk/

[Wilco]

My cya has consistently tested high, like 100. That is consistent with the history of previous owners using trichlor tabs exclusively. I thinkits more a product of the super hard water here not allowing chlorine to stay free. (?)

[CarlD]

No, it's a product of using TriChlor tablets that release 6ppm of CYA for every 10ppm of chlorine. That's why your CYA always tests high. Nothing to do with hard water at all.

[Wilco]

Ok, but the tabs aren't keeping the cl level up at all. So I quit and went with Bbb method. ( although haven't added the third b yet, not sur when to. TA stays about 80.