Addressing chemical needs after a significant drain

Jan 14, 2018
28
Space Coast, FL
Pool Size
10600
Surface
Plaster
Chlorine
Liquid Chlorine
Recently got my Taylor 2006-c and am ready to take responsibility of managing my pool after years of relying on local pool store testing. As of 2 months ago, Leslie’s had measured my cya at anywhere from 149-170. I had been using picks for roughly 15 years and had no idea about negative impact of high CYA. Using Taylor kit, it registered my cya at at least 100. I have since drained approx 3500 gallons. From what I can tell, I am getting closer. My cya is roughly 70-60 ppm but I am a newbie and “think” I am right-considering getting R-7065 for comparison so I can see when I hit 50 ppm. My question is, now that my pool is totally out of whack from draining, is there particular order I should address chemicals? Do I need to get alkalinity right and then hardness? Unsure. Thanks for the advice.
 
Get FC right for your CYA. Link—>FC/CYA Levels. This is priority #1.

Post a full set of test results and we will get you going on everything else…
Thank you for offering to help. Still draining…can only do 3 hours/day during the week. Added chlorine. Numbers to come shortly…I am hopeful I will have drained enough by the end of the weekend. According to Trouble Free calculator, I am looking at roughly a 3/4 drain…at about half now…
 
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Is your pump off during this whole time?

If you are replacing in increments, you know that water is still mixing and your draining is less efficient than doing it in one session...right?

It's ok, just know that it may take more session when you do it in segments due to mixing...

When you are done with exchanging water, turn the pump on and let it run for 12-24 hours, then test and post a full panel of results...
 
I live in FL next to a lake with a high water table and was concerned that hydrostatic pressure might pop out the pool. Either way, I think the drain is done. I hate to admit that the chemicals have been “come what may” for the week it took me to drain.

Here are my current numbers, which clearly need to be adjusted.

Cya= approx 45ppm
Alkalinity = 90
Calcium hardness= 170
PH=7.9
Free chlorine = 4.0
Combined chlorine = .5

Can’t wait for the water bill…😭
 
Good job!!

Always round your CYA up to the next 10. Your CYA is 50.
Get your FC up to range for your CYA. Always follow this...Link-->FC/CYA Levels
I would raise your CH to 200. Test your fill water CH and post that.

Good to go!

These may help!!

 
Updated numbers as of today;
CH=360
TA=90
pH=7.7
CYA=50
FC=6.5

So according to TFP ranges, these numbers look ok, I believe. Question is regarding Alkalinity. If I happen to ply the same numbers in the Poolie app, versus Pool Math, I am encouraged to base values off of adjusted total alkalinity to account for cya and current pH of which they say is the equivalent of 62.5ppm, and as such are looking for me to raise the alkalinity another 20-30 ppm. Thoughts, because I don’t get it!
 

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Ignore Poolie. Use pool math. Pool math uses the TA number from your test kit. Do not raise TA. A TA of 90 is ok. Manage your pH and over time TA will come down.

Did you test your fill water for CH?

How did CH go from 170 to 350?
 
I would also run you FC so that it is always 6-8 when you test. If you need to raise FC higher so that it is still in range when you test, do that. The amount of FC that get used in the fall, winter and early spring is less than the summer. In the summer, you may need to dose to 9-11 to have it be 6-8 when you test.

In the late spring you might consider raising your CYA to 60. This will help lower FC demand.
 
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