Testing CYA

[DavidD]

I'm thinking you should have around 40 ppm. What temperature is the water? I've found that the warmer the more accurate. Also, are you testing in lots of light, following instructions (waste level, looking in from top)? This is a very subjective test. You may want to get someone else test to get a second opinion.

Dave

[clayw1963]

Thanks for the help. Yes, I did clean the filter about a week after I added, so I may have washed some of it away (still in the habit from the baquacil). Did a retest this morning, waist high outside in the daylight and it is still testing low. Water temp is in the 80's (I'm in Nashville are too DavidD). I will take a sample to the pool store just to double check myself. I probably washed a lot of it away!

[les_smith]

I have the same problem. Here was the thread that I started:

http://www.poolforum.com/pf2/showthr...hlight=showing

I still don't show the level CYA that I think my pool has in it. But, I just watched how much chlorine was being burned up by the sun and let that tell me if my CYA was having an effect. I went from using 1.42 gallons (1 jug) of 6% clorox to only using 1/3 of a jug in about 10 days. Since adding the CYA Going on 2 1/2 weeks now, I've yet to backwash. So, I think I've got some stabilizer in there now, but my test doesn't show what I think it should. I should probably take a sample to the store, but I think me and my pool are in sync with one another so I'm happy with what I'm seeing.