Possible Water Leak — Clueless

BullishBear

Well-known member
Sep 17, 2022
83
Austin Texas
Pool Size
17000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-9)
Howdy TFP Fam,

I'm a newbie pool owner and the pool/equipment details are in my signature. I have been diligently testing since I took ownership of the property and noticed my salt levels are lowering at an unusually faster rate. It's been raining in Austin and except for last 2-3 weeks, it was scorching heat during the day and had to top up water every few days until rain started.

Test Date & Readings in PPM:
9/25/22: 1600
9/30/22: 2600 (after adding 160 lbs of Salt)
10/17/22: 2400
11/5/22: 2200
11/13/22: 2000

I literally measured the water level overnight before and after the pump runtime (Yes, the previous owner scheduled the run overnight and I kept it as is).

Observations: (1 Centimeter = 0.0328084 Foot; Surface area of the pool = 500 ft approx.; 1 Cubic Foot == 7.48052 Gallons)
1. When pump was running for 10 hours overnight, there was a consistent 0.5 centimeter reduction which translated to 60ish gallons of reduction ( 0.0164042 * 7.48052 * 500)
2. When pump was running for 6 hours overnight, there was a consistent 0.3 centimeter reduction which translated to 36ish gallons of reduction ( 0.00984252 * 7.48052 * 500)

Note: CYA and CH, which are almost impacted due to leaking water situation, remains fairly stable. Since CYA levels are ceiled to the top unit i.e if the black dot becomes unnoticeable when the level is between 50 & 60, the result is set to 60, there may be graduation reduction happening but not impacting the result yet. CH's test end point is tricky because it is to notice the switch from red to blue but it becomes purplish first before becoming proper blue and so I always hand to record a range of values and not exact number.

I ran the pump during the day to visually identify water leaks but no visible clues except for the attached photos but from the looks of it, they cannot contribute to 6 gallons of waste per hour.

Thoughts? What can be my next steps? Thank you for your time!
 

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Well, all I can say is I feel your pain. Same here with the weather and it caused me some concern. In my case however, it was a leak. See the link below about my experience. In that thread you'll find multiple links to include the TFP Pool School leak article and Wiki pages water loss info. I would start there to get as much info as possible to help you diagnosis what (if anything) may be happening. Also be sure your waste line isn't leaking water.

 
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What is that on the spill over between to blocks of rock? Cement? If so that's your leak. Cut that spill over off for a few days to see if that stops your leak. I bet your loosing water there.
 
Well, all I can say is I feel your pain. Same here with the weather and it caused me some concern. In my case however, it was a leak. See the link below about my experience. In that thread you'll find multiple links to include the TFP Pool School leak article and Wiki pages water loss info. I would start there to get as much info as possible to help you diagnosis what (if anything) may be happening. Also be sure your waste line isn't leaking water.

@Texas Splash Thank you for referencing post. Wow, that's so detailed. I need to take time to go over all steps. Will revert back here incase of any questions.
 
What is that on the spill over between to blocks of rock? Cement? If so that's your leak. Cut that spill over off for a few days to see if that stops your leak. I bet your loosing water there.
@ferretbone Thanks for the response. Did you refer to the third pic? If yes, it's the water spilling from Spa to Pool. The Spa and Pool are adjacent and connected. I posted that pic because I found, although most of the drops fall into the water stream there is always a couple of drops are falling on the cement block on the Spa structure's bottom. The outdoor wall of the Spa structure is also wet and a light trace of green algae is seen. Attached another pic that shows the top portion of the outlet from Spa to Pool bed.
 

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If the wall of that spill over on your spa is wet, and is dripping water down it start there. Because that grout needs to be patched. You can do a trip to Lowe's and seal that yourself Anything not rock on that wall is a leak. It's prolly just leaking under your deck. No worries just patch up that old grout along the spa wall, and where the coping meets the spa at the pool level.
 
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