Pool newby

jj52786

New member
Jun 28, 2023
2
Round Rock, TX
Pool Size
15000
Surface
Plaster
Chlorine
Liquid Chlorine
Hi all

We just moved into a house with a pool. Its a 15,000 galloon pool with aggregate (I think). We have a pentair clean and clear plus cartridge filter system. The pool is new built 1-2 years ago.

The prior owner gave me a rundown on his pool maintenance. He used 2-3 pucks of trichlor weekly, ran the filter 8 hrs a day, shocked when it rained and that was basically it. For what it is worth the water is crystal clear and no current algae issues.

As you can imagine our CYA levels are through the roof. I've read the pool school articles, and moving forward will stop using trichlor pucks and use liquid bleach as needed. Two questions:

I'm going to do the extended CYA test when I get home from work, but for now I know our levels >100. Everything I've read here says that I need to drain and refill. How do you actually do this? I can't find backwash or waste setting anywhere on my pool pump. And is their harm in draining the water below the skimmers? IE should I drain just a few inches, then refill/redilute and keep doing that till CYA levels are acceptable?

Second question is if I don't do drain/refill - how long will it take CYA levels to naturally come down? obviously won't use any more trichlor.

I'm frustrated that we are walking into this situation. I also want to maintain my pool myself and keep it perfect. Talking to some friends who have outdoor pools they said they only use trichlor pucks/shock (for years) and don't worry about CYA levels - how does this work?? I've seen in my pool the levels are off the chart from prior trichlor usage.
 
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Reactions: Texas Tony
Howdy! Good to hear that the pool is nice and clear and lets hope it stays that way. I'm going to attach our article on draining for you-

Along with our PoolSchool "lessons", you'll find a wealth of helpful info in our Wiki articles:

CYA takes some time to break down. Perhaps 5ppm per month?

Maddie :flower:
 
If your pool has any area close to it that is lower than the pool, you can do what I do when I have too much water due to rain. I take the vacuum hose and put one end in front of a return and the other end down the hill. Hold the hose over the return until water comes out the other end. That creates a siphon.
 
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Reactions: YippeeSkippy
Howdy! Good to hear that the pool is nice and clear and lets hope it stays that way. I'm going to attach our article on draining for you-

Along with our PoolSchool "lessons", you'll find a wealth of helpful info in our Wiki articles:

CYA takes some time to break down. Perhaps 5ppm per month?

Maddie :flower:
thank you!

I ran my full tests today I think i'm in trouble
I have the Taylor kit ya'll recommend
FC 6.5
CC 0.2
pH 7.6
TA 80
CH 300
CYA 200

I'll do the pool drainage likely this weekend, using the pump/hose technique. Based on the pool temps (we are in TX they are hovering around 90 degree) will fill in deep end and pump from tanning ledge.

We have a a 15k gallon pool - ideally it sounds like we would remove 50-75% of our water. Is it safe to do that all at once? I would imagine after a while it would become less efficient due to mixing as well.

Would you add chemicals as you are draining? I'll calculate my exact GPM via hose but assuming its around 10 GPM, thats 600 gallons an hour. It'll take at least ten hours if not longer to drain half, am I at risk of a significant growth during that time or just do the drain then add the liquid chlorine at the end of the day?
 
200 CYA?!?! OUCH!

First off, if you're going to first drain - got any ground water issues? If so, get professional help lest you risk the pool floating.
If you are instead goiing to exchange water you shouldn't have any problems.

As you fill you can pour some liquid chlorine in, then when entirely full run a full panel of tests again and re-balance.

I would use as many hoses as possible to work on filling the pool up again (assuming you emptied it, not doing an exchange)

Maddie 🇮🇹
 
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