Recent content by SkiBikeGolf

It is a pool wall. The interior is pool, the exterior is what your see. At the top is a shadow, then the Limestone coping. Over the top of the coping you can see the pool water and then the other side of the pool.

Dave, Sorry, I forgot to post the questions. But you answered. The wall is a retaining wall for the pool it is 4' out of the ground. I will look for the bucket test. I assume I can ignore the builder's comment that the staining is normal.

My brother-in-law has this water leak / staining with his pool. This is a new build has had water for about a month. He was told this is normal. I don't think this is Ok, but I am not an expert. The water stain / marks are opposite a jet to the pool. Here are my questions:

Hmmm, if they are stabilizer granules, I wonder if I could add them to tap water and then test for the presence of CYA?

Maddie, Thanks for the suggestion: I gathered some of the white stuff, let it dry and placed on a paper plate. I added 3 separate drops of muratic acid to the white stuff and saw NO bubbling or fizzling. chemgeek, do you have any suggestions for identifying the white stuff. Show below is...

I drained half my pool and added 8,000 gallons to refill. I cleaned my Filter, added DE, and have gotten my chemistry close to where TFP recommends: FC: 9.5 pH: 7.5 TA: 150 CH: 450 CYA: 90 CSI: 0.30 Just yesterday, I noticed an accumulation of "white stuff" in my hot tub. It is no DE...

I do not plan to drain and refill for a while I do NOT have a SWG. Am I reading the CYA/FC chart correctly? The chart says my FC target level is 10 -12. However, when I read about FC above 10, many posts on the internet say it is not safe. Will my swimmers complain with FC above 10?

Well Dang!. The actual CYA after draining 1/2 way (about 8,000 gallons) and then refilling ended up at 90-100 I was surprised the FC dropped so much and I did not expect the pH to go up. The TA ended up close to predicted and the CH actually was better than predicted. I just added 1/2 gallon...

As you can see, I am about 1/2 way drained for my refill

Armed with accurate chemistry values, I draining my pool to get the CYA under control. At first, I thought I would have to drain 2/3 of the pool, but it appears I can drain 1/2 way and end up with a CYA value of 67. Any thoughts?