New and very confused

Oct 2, 2020
14
Houston
Totally new to this- I have 17,000 gallon pool which is maintained by local pool company weekly. Never seen them sample water always 3 x 3 inch chlorine tabs left in skimmer weekly. Decided to test today with a Taylor K-2006C test kit. Followed instructions exactly and this is what I found:
1. FC 19 PPM (yes 19 not 1.9)
2. CC 0
3. PH 7.5
TA 150
CH 575
CYA off the scale 100 ++ used probably 2mL of suggested 14 mL of solution and black dot disappeared at base of tube.
Not sure what I need to do ??? To get chemical balance back? Is it safe to swim? We have been and no burning or bad feelings whatsoeverAny advice appreciated. Thank you!
 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
15,185
Evans, Georgia
Steve, welcome to TFP. If you read here much you'll read this story again and again.

Pool Care Techs don't have time to slow down and test each pool they see in a day, or they'd never see enough to earn a living. Its in-and-out in the least time possible. So they do a quick pass and drop some chlorine pucks in the skimmer and move on.

The pucks contain almost as much stabilizer (CYA) as chlorine and it builds up rapidly. So your CYA is high, and the only way to keep your pool clear and algae free is to keep your FC level also astronomically high. Then one day....that FC isn't high enough and the algae take over.....The Pool Care Tech will tell you the pool has "chlorine lock" or some other story and it requires a drain and refill to start the cycle all over again.

Good call getting a good test kit. Now you have to decide whatcha want to do about it?? Let them continue to manage your pool or you take over management?

A drain and refill *is* in order....but with a fresh fill you can avoid this becoming a regular event if you take over. Or if you still want them to do some of the work, you tell them what chemicals and when it should be added.

Maddie
 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
15,185
Evans, Georgia
Additionally... run that CYA test again but doing it this way:
Take equal parts of pool water and tap water (which never contains CYA) and use that as your pool water sample and test again. Then double the results. This will help decide how much water you need to drain to bring the CYA level down to a workable amount.

Let us know the result.

Maddie
 
Oct 2, 2020
14
Houston
Hi Maddie, firstly thank you very much for the reply, it is really appreciated! Retested with 50% tap water as you mentioned and got further up the tube before the black dot disappeared but still short of the first 100 reading on the test tube. Used a pool test strip (please see attached) and it looks somewhere between 200 - 250 so ridiculously high. Thinking about draining 50% of the pool and refilling and retesting to see if that works......any advice welcome. Definitely considering taking this over myself as I would have hoped the pool company would have told me about this. Thanks Steve
 

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YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
15,185
Evans, Georgia
Before you go doing any draining, can you please fill out a signature line (found under settings) describing your pool, its equipment, etc. This helps us answer you better.

How do you plan on doing the drain? Do you know where the drained water will go?

Maddie
 
Oct 2, 2020
14
Houston
Hi Maddie, I think I have filled it out. We have a 17,000 gallon pool, with an earth filter. I think pretty standard set up....I have attached some pictures. I am going to ask the pool guy to drain, I would hope he follows all the necessary requirements.
 

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YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
15,185
Evans, Georgia
How do you plan on doing the drain? 50% is a good amount- hows the ground water in your neighborhood? We don't want to have any surprises with ground water problems pushing up the pool.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
22,155
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Use the dilution ratios below to ballpark your CYA level...

For CYA > 90ppm, repeat the test adjusting the procedure as follows:

  1. Fill the mixing bottle to the lower mark with pool water.
  2. Continue filling the mixing bottle to the upper mark with tap water.
  3. Shake briefly to mix.
  4. Pour off half of the contents of the mixing bottle, so it is again filled to the lower mark.
  5. Continue the test normally from adding R-0013, but multiply the final result by two.
If you need to dilute the pool water further then apply these ratios:

Pool waterTap or distilled waterMultiply result by
112
123
145
Note that when doing a diluted test not only do you multiply the range of the test you multiply the error rate of the test, so results are a ballpark - not an absolute.
 
Oct 2, 2020
14
Houston
Thank you that is very helpful, I have decided I am going to do a simultaneous fill and empty using colder fresh water to the deep end floor and pump from the shallow end 2nd step. I will attempt to balance input and output and go for a 2/3 exchange and then re-sample to see what the chemistry looks like mainly the Free chlorine and the CYA which is the current problem. Fingers crossed totally newbie at this so will write up what happens😉
 
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HermanTX

Gold Supporter
May 20, 2020
1,168
Katy TX
Pool Size
14600
Surface
Plaster
Chlorine
Liquid Chlorine
In the pictures it shows an inline chlorinator so why is the pool guy putting pucks in your skimmer? It is never good to put chlorine directly into your skimmer. Once you do the drain/refill suggest you stop the pucks and go to Liquid Chlorine. Go to the pool store (suggest Pinch a Penny or Leslie's) or Home depot (if they stock it in your area) to buy it.

Also, suggest you test your fill water now so you know what you can expect with regard to Alkalinity and Calcium levels.
 
Oct 2, 2020
14
Houston
In the pictures it shows an inline chlorinator so why is the pool guy putting pucks in your skimmer? It is never good to put chlorine directly into your skimmer. Once you do the drain/refill suggest you stop the pucks and go to Liquid Chlorine. Go to the pool store (suggest Pinch a Penny or Leslie's) or Home depot (if they stock it in your area) to buy it.

Also, suggest you test your fill water now so you know what you can expect with regard to Alkalinity and Calcium levels.
Not sure...…...but anyway going to go to Liquid chlorine as you suggest and great suggestion I am going to test the refill water to see what I might be contending with as going for a 2/3 refill/exchange. Thanks for your comments. teve
 
Oct 2, 2020
14
Houston
Use the dilution ratios below to ballpark your CYA level...

For CYA > 90ppm, repeat the test adjusting the procedure as follows:

  1. Fill the mixing bottle to the lower mark with pool water.
  2. Continue filling the mixing bottle to the upper mark with tap water.
  3. Shake briefly to mix.
  4. Pour off half of the contents of the mixing bottle, so it is again filled to the lower mark.
  5. Continue the test normally from adding R-0013, but multiply the final result by two.
If you need to dilute the pool water further then apply these ratios:

Pool waterTap or distilled waterMultiply result by
112
123
145
Note that when doing a diluted test not only do you multiply the range of the test you multiply the error rate of the test, so results are a ballpark - not an absolute.

Thank you that is very useful!
 

HermanTX

Gold Supporter
May 20, 2020
1,168
Katy TX
Pool Size
14600
Surface
Plaster
Chlorine
Liquid Chlorine
Steve,
Though you listed some of your equipment in your original post and gave some pictures, it is best to Create Your Signature to help us understand what your current setup is. Thanks.
 

setsailsoon

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Oct 25, 2015
3,804
Stuart/FL
Pool Size
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Surface
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CircuPool RJ-30 Plus
Steve,

The best price for liquid chlorine by far is using refillable containers at a HASA or Napco facility. It's often half the price or better than purchases by the gallon. Napco (NW Houston) sells the jugs and I'm pretty sure HASA does as well.

Chris
 

HermanTX

Gold Supporter
May 20, 2020
1,168
Katy TX
Pool Size
14600
Surface
Plaster
Chlorine
Liquid Chlorine
Steve,

The best price for liquid chlorine by far is using refillable containers at a HASA or Napco facility. It's often half the price or better than purchases by the gallon. Napco (NW Houston) sells the jugs and I'm pretty sure HASA does as well.

Chris
Every HASA dealer I call state they only sell to retail stores or pool companies. I called 3 in the Katy,TX area with all the same response. I have not called NAPCO yet but they are quite a distance from me. If someone knows of a HASA dealer selling to public in Houston area, that would be helpful.

Update - called Napco in Spring TX. They sell 12.5% LC for $1.85/gal plus a $2 govt. fee. If you buy a 5gal container with LC it is $29.23 first time. Then just pay for refills. They only sell to public on Mon, Wed & Fri from 8am to 12pm
 
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setsailsoon

Gold Supporter
LifeTime Supporter
TFP Guide
Oct 25, 2015
3,804
Stuart/FL
Pool Size
12800
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-30 Plus
Every HASA dealer I call state they only sell to retail stores or pool companies. I called 3 in the Katy,TX area with all the same response. I have not called NAPCO yet but they are quite a distance from me. If someone knows of a HASA dealer selling to public in Houston area, that would be helpful.

Update - called Napco in Spring TX. They sell 12.5% LC for $1.85/gal plus a $2 govt. fee. If you buy a 5gal container with LC it is $29.23 first time. Then just pay for refills. They only sell to public on Mon, Wed & Fri from 8am to 12pm
Steve,

Thanks for the update, I haven't lived in Houston for years so it looks like things have changed. I do have a friend that still buys from Napco.

Chris
 
Oct 2, 2020
14
Houston
Steve,

The best price for liquid chlorine by far is using refillable containers at a HASA or Napco facility. It's often half the price or better than purchases by the gallon. Napco (NW Houston) sells the jugs and I'm pretty sure HASA does as well.

Chris
Thanks Chris info really appreciated I will try them out. Take care Steve
 

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