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

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?

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!

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...

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.

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!

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...

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...

Thanks for all the answers! Informative.

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....

Very good points. Thanks.

Thanks!

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...

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.

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...

The pool is around 21,000 gallons. When using the Pool Math app, does pebbletec qualify as "plaster"?

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?

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"...

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...

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.

Thanks for that link; makes a lot of sense. Will try the diluted test tomorrow.

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...

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...

I've only been using AquaChek 551236 7-Way test strips...

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...

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...