Search results

1. 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. 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. 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. 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. 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. 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. 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?

Thanks!
9. 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...
10. 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...
11. How often do you test your pool water? (poll)

Thanks for all the answers! Informative.
12. 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....
13. Chlorine/CYA chart vs 7.5% of CYA

Very good points. Thanks.

Thanks!
15. 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...
16. Pool app vs Pool Math

I see. My mistake. I thought I got that link from a posting here... Yes, I am using that product, downloaded from the AppStore. I logged into it with my TFP email and password. 1. Why under contact info in Pool Setup is the email blank? Is this so you can send different people emails about...
17. Can muriatic acid and liquid chlorine be added at the same time?

Thanks all of you! Well, I'm glad I found this place (TFP) recently, because the amount of conflicting and erroneous advice to be found by googling about pool chemistry is totally confusing.
18. Can muriatic acid and liquid chlorine be added at the same time?

Maybe in different parts of the pool? Or how long should you wait? Also, one thing I read about adding muriatic acide said to do it when the filter pump has been off for an hour, and dump it in the deepest part, and wait another hour before turning the pump on. Is that correct? [Link Removed...
19. Pool app vs Pool Math

I have a similar problem and similar questions: When I go to the app.poolcalculator.com page on my laptop, and try to login, using the same credentials as my account here, it says: "there is no use corresponding to this identifier." ...even though I know the email address and password are...
20. Low ph and high TA, aeration not working

The pool is around 21,000 gallons. When using the Pool Math app, does pebbletec qualify as "plaster"?
21. Low ph and high TA, aeration not working

I replaced most of my water. New readings: CH 425 PH 7.6 TA 140 TC .5 CC .5 CYA 60 Where should I go from here?
22. Low ph and high TA, aeration not working

Thanks - I did not know that! Assuming I drain most of the water (which I'm doing right now) and get the CYA way down, what should I use moving forwards? I've been told that liquid chlorine does not "last"...
23. Low ph and high TA, aeration not working

So I tried the diluted CYA test. Still way off the chart. So I tried a 4x diluted test (fill pool water halfway to 7ml mark, add tap water up to 14 ml mark, mix, throw away half down to 7 ml line, add reagent). At this point it reads maybe 100, which x4 would be 400! (I doubt there's any...
24. Chlorine (free) issues with Taylor K-2006 vs Taylor 9265 magnetic stirrer

Can the Taylor Speedstir 9265 be used with the tubes in the K-2006C test kit? Just want to be sure before I order it.
25. Low ph and high TA, aeration not working

Thanks for that link; makes a lot of sense. Will try the diluted test tomorrow.
26. Question about K-2006C FC and CC testing

So I got a Taylor K-2006C test kit. Tried the chlorine tests today for the first time, carefully following instructions. I used the 1 drop = 0.5 ppm and the 10 ml sample. My question is: how long are you supposed to wiat, or take into account time, when getting the water to turn colorless? In...
27. Low ph and high TA, aeration not working

OK, I got the Taylor K-2006C. I just complete my first set of measurements: CH 1000+ FC 8.5 CC 3 ph 7.0 or less (kit won't show anything less) TA 135 CYA - off the chart (kit only shows up to 100; extrapolating mine looks like 200, only takes 1/4" of water to cover the black dot.) So, I think...
28. Low ph and high TA, aeration not working

I've only been using AquaChek 551236 7-Way test strips...
29. Low ph and high TA, aeration not working

Thanks. I thought that might be the case about the aeration. That "fountain" was about all I could find. I also tried running my (connected) spa area's jet pump 24 hours a day and having it set to overflow into the pool so the water was constantly being exchanged with pool water, but that didn't...
30. Low ph and high TA, aeration not working

Hi. New here, having some trouble with my chemistry (low PH, high TA). I have a 21,000 gallon pebbletec pool. I heat it, min temp is 83 but its now going over that in the daytime as it heats up here in Arizona. So temp is about 85 or 86 now during the day. My stats are this at the moment...