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Thank you, that is very helpful. It is interesting, though - Hayward claims that the internal bypass keeps the water from circulating until it is 104 degrees, and when the pump is off. There's a sliding valve inside the header that is actuated by some sort of rod, but, honestly, I have never...

Hi All, I have a pool with a Hayward H250 Ed2 heater. It seems the heat exchanger (which I replaced only 3 years ago) is leaking again. I have a couple of questions. 1)If the heater is leaking when the pump is running but the heater is off, does that mean the internal bypass is broken, or is it...

I have a coverstar cover that suddenly is unspooling faster than it moves across the pool when I am closing the cover, causing the slack cover to get caught in the box. Is there a clutch on the cover spool that can slow the unspooling or apply some sort of resistance? As it draws the cover out...

Take a look at this blog post: http://blog.ingroundliners.com/?p=321 Pictures look stunningly similar to mine. I am having the liner replaced this fall. Here is what I have decided to do: 1. maintain my chlorine at 3ppm, no higher except during superchlorination. 2. maintain my pH as high as...

That's true, Vanya, thanks for pointing that out--I DON'T have any wrinkle problems on the walls of the pool. Would I see that with acid-based wrinkling? That would be a nice way to rule it out. I would think that expansion "buckling" would also show on the walls, though perhaps since there is...

Vanya, the wrinkles are hard ridges then? The ground seems completely flat under the pool (which makes me wonder about ground water, too--I would think that would deform the floor under the pool). The wrinkles in mine are sometimes hard, sometimes much softer; I've not been able to directly...

Well, free Cl is high when I shock, but comes down pretty quickly. I had been keeping my FC a little higher (~5ppm) because of the cya reading (~50). I still wonder though about the effects of the cover, which is closed whenever we are not using the pool) and the high amounts of chlorine I put...

Dave, the shading is fooling you, they are raised, and right now rather soft. My wife just found this article, which intrigues me as it makes a great deal of sense in my situation, if true. What do you make of it? http://www.aquabyte.com/starling/Swimmi ... rption.pdf Yet another thing to...

So here's what's happened since my earlier post. The wrinkles have worsened, though unexpectedly (if it was water infiltration) they seem to have gotten worse during a very dry period. They now are are on all the horizontal pool surfaces except the deepest bottom. All run primarilly across the...

Thanks for the hint about smoothing the wrinkles! We did have a very strange Spring--no rain for 2 moths then quite a bit of rain, but I am still not entirely convinced that it is subsurface water; there was a water issue when the pool was built; the builder didn't put in a pump, but did...

Thanks, I will try to get a full set of test results and some pictures later today. Last pH readings were ~7.2. I do have an opaque, automatic cover which I use most of the time. John OK: Added an image. Best I could do--this is looking down the slope into the deep end; best place to see the...

As I said in my post, it is an in-ground pool. I am getting soft "blisters" in the liner, maybe 6-8" long, 3-4" wide, pretty evenly distributed about the pool. I will try to post a picture later. they are soft, and give the bottom a "squishy" feel under the toes. I am guessing that water is...

Ok, I'm freaking out. I finally got through my CYA-Ammonia-superchlorination drama on my 16x34 5-year-old inground vinly pool, gotten all the numbers good, pool sparkling, and a couple of days ago I noticed a few bubbles in the liner. Small, low, barely noticeable. Today I looked, and either...

Also, HUGE thanks to both of you--the Pool Calculator is an incredible help, and my TFT test kit has saved me many times. This site is the best! You were the only place that helped me diagnose and solve my ammonia problem the first time it happened (Thanks Chem Geek!) John

Jason- What I meant regarding the ammonia was that if I was not using the tabs for chlorination, I would have no (or low) CYA, and little for the bacteria to convert to ammonia. As for my CYA level, I NEVER get a reading above zero on test strips, and using the test kit in my testing set (the...

Hi all! This is my 5th season with my pool; it's a 16x34 in-ground, vinyl lined pool, with a coverstar automatic cover. I have an in-line chlorine feeder that uses 3" trichlor tabs, and a hayward cartridge filter. The first year, the pool was a dream--it used almost no chlorine; I maintained...