Recent content by azpooldude

  1. azpooldude

    How much CYA to add to go from 30 to 40?

    Thanks for that! I see that it's 27 oz. by weight and 28 oz. by volume, so not much difference...
  2. azpooldude

    How much CYA to add to go from 30 to 40?

    One other question: When they say 28 oz, is this 28 oz. by weight or by volume? In other words, I guess I have to weigh it and not use a measuring cup?
  3. azpooldude

    How much CYA to add to go from 30 to 40?

    Yes, I'm sorry - my bad. I have Pool Math on my phone. Duh. I usually just use it for CSI. Thank you! Enjoy the weekend swims!
  4. azpooldude

    How much CYA to add to go from 30 to 40?

    Hi, I feel like my CYA is getting a bit low at 30 (it's been gradually going down over the last few months; I use liquid chlorine only and muriatic acid to control ph.) So I bought some stabilizer. I'm just wondering how much to add to go from 30 to 40 in a 20,000 gallon pebbletec pool? I don't...
  5. azpooldude

    Best Places to Buy Liquid Chlorine

    Here in Scottsdale/Cave Creek AZ, Home Depot seems to be fairly cheap with 2 gallon boxes of 10% for 6.17 when you buy 4 or more boxes (8 gallons total).
  6. azpooldude

    how critical is the amount of R-0870 DPD powder to the FC test?

    Great - good to know. So I guess a little bit much is better than too little. Maybe one overflowing dipper would do it instead of trying to get 2 dippers exactly at the top.
  7. azpooldude

    how critical is the amount of R-0870 DPD powder to the FC test?

    So I use the Taylor K2006C, and I usually do the 10 ml. sample. The instructions state "add 2 dippers R-0870". The actual dipper itself seems kinda arbitrary to get the correct amount. How much would too much or too little of DPD powder affect the test?
  8. azpooldude

    Trying to lower PH slightly but only my TA goes down

    With my water hardness (CH 450) and my TA at 80 (lower end of recommended range), a ph of 7.8 would result in a CS value of 0.35 according to pool math app. As it is, right now with ph 7.6, I have a CSI calculation of 0.16, which is acceptable. This is why I want a lower ph. And anyway, isn't...
  9. azpooldude

    Trying to lower PH slightly but only my TA goes down

    CYA: 50 FC: 6 CC: 0 CH: 450 PH: 7.6 TA: 80 21,000 gal pebbletec pool. Arizona. Pool water currently about 88° during the day. A week or so ago my TA was 110, and my PH was 7.6, sometimes 7.7. I guess PH of 7.6 is "ok", but I was trying to get it to 7.5 or 7.4 - just to see if I could. So I...
  10. azpooldude

    How often do you test your pool water? (poll)

    Thanks for all the answers! Informative.
  11. azpooldude

    How often do you test your pool water? (poll)

    Since I replaced my pool water a few weeks ago and finally bought a Taylor K2006A test kit, I've been testing every day. I don't always to CH or CYA, but I always do FC, CC, PH, TA. Is that excessive or normal? Wondering what others do....
  12. azpooldude

    Chlorine/CYA chart vs 7.5% of CYA

    Very good points. Thanks.
  13. azpooldude

    Chlorine/CYA chart vs 7.5% of CYA

    I believe I've seen it said here that FC should be 7.5% of CYA. In other words, if your CYA is 50 then FC should be 3.75 (let's say 4). I've also been referred to the Chlorine/CYA Chart which says that for a CYA of 50, FC should be 6 to 8, with a minimum of 4. So is the 7.5% calculation that...