DIY 27’ round semi inground

[ejbuffett]

Pool update... we have been up and running for 16 total days. Water is crystal clear, and I have no problems... BUT, I am burning through 10% liquid chlorine at what seems to be a high rate. I am adding anywhere from 60-100oz/day to maintain chlorine levels (right at 10 gallons in 16 days). I am testing and adding chlorine in the evenings. I did an OCLT last night and the FC was within 1ppm. I am losing about 4ppm/day. The pool gets about 10-11 hours of direct sunlight per day. All other test number are great.

Here are my test results as of 0700 today:
- FC: 5
- pH: 7.8
- TA: 75
- CYA: 40

When I retest this evening, I can pretty much guarantee the FC level will be 1.

I guess my question is, is this a normal amount of chlorine loss?
Should I consider an alternative chlorination method (chlorinator and puck... I was trying to avoid this method)?
Should I try and bump my CYA up a little bit to counter the chlorine loss, or is this not effective?
Or do I just accept it and keep going with the liquid?

Obviously shade would help here, but until the deck is built during the off season I don't have a great shade solution.

 

[Texas Splash]

When I retest this evening, I can pretty much guarantee the FC level will be 1.

That's no good for sure. You never want the FC that low (algae). It's good you passed the recent OCLT, but you may need to do one more to be safe. If all is good with the OCLT, increase your CYA to at least 50. Also keep the FC a bit higher with that CYA. When I was using liquid in our almost 18K pool, I used a half gallon of 10% each evening (2.5 ppm) like clockwork. If we had a lot of swimmers it would need more. But that was with a CYA of 60-70 because it's so blazing hot down here.

 

[ejbuffett]

That's no good for sure. You never want the FC that low (algae). It's good you passed the recent OCLT, but you may need to do one more to be safe. If all is good with the OCLT, increase your CYA to at least 50. Also keep the FC a bit higher with that CYA. When I was using liquid in our almost 18K pool, I used a half gallon of 10% each evening (2.5 ppm) like clockwork. If we had a lot of swimmers it would need more. But that was with a CYA of 60-70 because it's so blazing hot down here.

Okay, I will do another OCLT just to be sure.

Any thoughts on how to keep it from dropping this low during the day? I check in the mornings around 0600 and its good. I work all day and by the time I get home and check it (usually around 6-7pm) its already dropped to 1 or 1.5.

Temperatures here are awful as well... high 90s with index around 110 for weeks now.

 

[Texas Splash]

Any thoughts on how to keep it from dropping this low during the day? I check in the mornings around 0600 and its good. I work all day and by the time I get home and check it (usually around 6-7pm) its already dropped to 1 or 1.5.

That's where the CYA should help. If your pool truly is algae-free, it's all about the sun. So I would probably take the CYA up to a solid 50 and that should help quite a bit. You could even go to 60 later if you thought it would help, but try 50 first, Of course with a higher CYA, you need to increase the FC to the new ideal range per the FC/CYA Levels, but it should hold much better.

 

[phonedave]

Pool update... we have been up and running for 16 total days. Water is crystal clear, and I have no problems... BUT, I am burning through 10% liquid chlorine at what seems to be a high rate. I am adding anywhere from 60-100oz/day to maintain chlorine levels (right at 10 gallons in 16 days). I am testing and adding chlorine in the evenings. I did an OCLT last night and the FC was within 1ppm. I am losing about 4ppm/day. The pool gets about 10-11 hours of direct sunlight per day. All other test number are great.

Here are my test results as of 0700 today:
- FC: 5
- pH: 7.8
- TA: 75
- CYA: 40

When I retest this evening, I can pretty much guarantee the FC level will be 1.

I guess my question is, is this a normal amount of chlorine loss?
Should I consider an alternative chlorination method (chlorinator and puck... I was trying to avoid this method)?
Should I try and bump my CYA up a little bit to counter the chlorine loss, or is this not effective?
Or do I just accept it and keep going with the liquid?

Obviously shade would help here, but until the deck is built during the off season I don't have a great shade solution.

My pools is the same size as yours and gets the same amount of sun. When I was using Liquid Chlorine in my pool, I had to add roughly a quart a day. Things cause that to vary, but it is a reference point.