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  1. calinb

    Stain ID

    Yes--I did the ProTeam Metal Magic sponge test three years ago and I used the associated Metal Magic prescription. MM removed most of the stains (caused by spring water lab tested at 4.44 ppm Fe). The stains were more of a gray color than your stains. The pool water turned very white and I used...
  2. calinb

    Solar Cover Disintegrating

    How high is your water temp? This is an extremely hot year for the west coast of the U.S. and my pool, which has never been over about 90 F and that was in late August, has already hit 95 once! According the the instruction sheet, water temps over 90 can damage solar pool covers. We are on...
  3. calinb

    Opening Day!

    Yes--we have a very long closure season here in Idaho but the forecast of a much warmer than average June motivated me to open a 53 degree pool today, which is earlier than the three years since I became a pool guy when we purchased this home. Very high winds over the last several months with...
  4. calinb

    Clean Core35 SWG at Closing?

    Thanks, mknauss! I'll clean it so it's ready for next year. My pool CSI is normally negative. The lowest it goes is in the winter when water temps near freezing bring it down to around -0.3. I'll try water first but the manual says I can mix one part muriatic acid into ten parts water.. It...
  5. calinb

    Clean Core35 SWG at Closing?

    I installed a Core35 at the beginning of the season. It has performed well and I've never seen the cell cleaning annunciator illuminate over all these months. I just closed our pool and I removed the Core35, dumped out the water, and stored it in a warmer environment. I noticed that the cell...
  6. calinb

    Turning the SWG off during SLAM

    My Core35 SWG simply plugs into a 110 VAC GFCI outlet so I put a wall timer in the outlet to insure it only comes on when the pump timer is set to run the pump (a safety precaution in case the Core35 water flow switch fails). So it's really easy for me to manage the SWG, with or without the pump...
  7. calinb

    Turning the SWG off during SLAM

    For a SLAM, I don't think that precisely quantifying chlorine demand really matters much, except at night when you elect to do an OCLT (and then your turn-off the SWG and eliminate all other sources too). During a SLAM, you must only keep up with demand but I don't see any reason to precisely...
  8. calinb

    Jacks Magic Stain Solution 2 Recovery

    Okay guys. My CC is finally back to zero! It's been nearly 10 months since I started the treatment. I checked it last night and again this AM and it's zero. It fell fast (relatively) once the sun came out and water warmed-up. The water is about 84 F now. We had cloudy, weather and a cool and...
  9. calinb

    Algae getting worse early in SLAM?

    Hey Texas Splash, How about a trichlor puck test on the steps too? I've never had organic staining but seems like yellowish stains could easily be organic (not that color is all that great of a diagnostic aid for stains in general, IMHO).
  10. calinb

    Jacks Magic Stain Solution 2 Recovery

    It's getting there (CC continues to drop), but I started the treatment 10 months ago! I used 20 lbs of sulfamic acid / #2 in a 17,500 gal. pool instead of the recommended 17.5 lbs so my dosage was a little high, but not that much higher than recommended so I don't think that's my problem. My...
  11. calinb

    Turning the SWG off during SLAM

    Until I'm ready to do an OCLT, I only need to now if I'm adding Cl fast enough to keep up with demand and maintain the target SLAM level. Even if I'm adding some or all of the Cl with my SWG, I can tell if I'm keeping up with demand and that's all I need to know. In fact, continued testing, even...
  12. calinb

    Trichlor and Liquid Chlorine experiment!?

    Yeah--I think mknauss has reported somewhere how much CYA he loses in sunny Laughlin, NV. It's not completely insignificant, as I recall. The first two seasons that I opened my pool here in Idaho, I had the opposite problem. Winter consumed ALL my CYA. This season was different--maybe because...
  13. calinb

    Turning the SWG off during SLAM

    Your second point is the one that matters to me, though I can always turn it off when I feel I'm ready to do a OCLT. Wear and tear though? Yup--it costs ya' (and electricity too) but, according to my calculations, bleach costs more--especially during these panic-demic times!
  14. calinb

    Jacks Magic Stain Solution 2 Recovery

    I ran the Jack's #2 treatment for about 10 weeks late last season. Then I balanced and closed the pool in December but had zero FC in testing. (Tests reported all Cl as combined.) I opened to a green pool about a month and a half ago, which was abnormal. FC is very gradually coming back but it's...
  15. calinb

    Sand filter clean pressure jumped from 12 to 17 psi

    I compared the readings against a second gauge and they agree well so it appears that I've got a partial blockage somewhere. At least the evidence points to it NOT being in the return plumbing! Strangely, the high pressure is not present when reversing the flow through the filter. Multiport...
  16. calinb

    Post stain removal problems

    Stains cannot be reliably identified by their appearance. I recommend doing tests before treatment. If you are contemplating using Metal Magic, here's the MM sponge test procedure: https://www.proteampoolcare.com/images/uploads/MetalMagicSpongeTest.pdf Alternatively, you could use a Jack's...
  17. calinb

    New, proud owner of neglected 50 year old gunite pool

    Please avoid using Photobucket, if possible. I'm a member of many forums that once hosted useful information and howtos that were rendered worthless after Photobucket pulled the plug on free photo hosting for the contributor's images. When I think of the efforts lost by dedicated and diligent...
  18. calinb

    Sand filter clean pressure jumped from 12 to 17 psi

    Thanks for the heads-up, duraleigh. The 0-30 psi scale makes more sense than my current 0-60 unit. Most of these meter specs express error as a fraction of full scale deflection--at least in part. I'll need to order TF-100 refills and other maintenance hardware soon so it'll help to to qualify...
  19. calinb

    Sand filter clean pressure jumped from 12 to 17 psi

    Thanks very much for your prompt reply, duraleigh! The gauge reads zero when the pump is off. I can't discern anything visibly different from before, other than the gauge reading. Gauges are relatively inexpensive so, out of curiosity, I think I'll order another one. Accuracy isn't important but...
  20. calinb

    Sand filter clean pressure jumped from 12 to 17 psi

    Our pool filter has been working hard this year. First, I opened to a green pool. I think it was related to the late season Jack's #2 treatment I did last year and using only Polyquat 60 instead also first shocking with chlorine before closing. I had fears of stain re-deposition with the...
  21. calinb

    Looking for advice about solar cover strap placement for kidney shaped pool.

    Hmm...It just dawned on me that even a circular or oval shaped solar pool cover that's connected along an inboard strap line and not at the edge of the pool (straps on centerline for a circular pool for example) makes deployment of the cover almost certainly a two-person proposition. The cover...
  22. calinb

    Looking for advice about solar cover strap placement for kidney shaped pool.

    The old cover came with the pool had straps at the end of the pool connected along the edge of the cover (longer strap lengths when progressing along the curve of the kidney "lobe"). This position makes reeling up the cover difficult because the edges of the cover at the wide kidney lobes drag...
  23. calinb

    What to do if I can't find chlorine?

    Yes! :( The cheapest liquid I can find this year is the 6% stuff at Walmart...when they have it. Given the current promotions at Doheny's and In The Swim, Walmart bleech is currently my most expensive source of Cl. For my 17,500 cal pool, the cost per ppm is currently: bleach $0.77 calcium...
  24. calinb

    FYI: 2019 Pre-closing Jack's #2 Treatment >> 2020 Opening Strangeness

    It's not flawed. Of course it assumes (requires) that the experiment is done correctly.. No great quote could possibly contain all the relevant caveats, which are covered in the Feynman quote by the many implications of the word "experiment." Thanks for supplying the quote, verbatim...
  25. calinb

    FYI: 2019 Pre-closing Jack's #2 Treatment >> 2020 Opening Strangeness

    I almost didn't post this FYI here and was expecting your reply JoyfulNoise, but perhaps others will benefit from my hands-on experiences--even if it only sets their expectations under similar circumstances. Have you ever done a prolonged, high concentration sulfamic acid treatment yourself (not...
  26. calinb

    FYI: 2019 Pre-closing Jack's #2 Treatment >> 2020 Opening Strangeness

    This is the third time I've opened this pool, which we acquired with our new home just over two years ago. I closed the pool last December, which is a very late closing here in Idaho, because I wanted to give my late-season Jack's Magic #2 treatment the longest time possible to work on copper...
  27. calinb

    How cold of water will you swim in?

    Last year, I took a swim at 60- degrees before I closed. I have to admit that even the 70s are not much fun. This year I won't be doing a pre-close swim. Our pool is already at 53 degrees and I'm keeping it open for a sulfamic acid copper stain process in progress. I only had two weeks above 65...
  28. calinb

    Will a Circupool Core35 remember its settings when powered from a timer (120V)?

    Great and thanks for your reply, ajw22! I'm very much looking forward to powering it up next season and nearly eliminating the need for the bleach brigade. I ordered it late yesterday and Discount Salt Pool had already shipped it out this AM.
  29. calinb

    Will a Circupool Core35 remember its settings when powered from a timer (120V)?

    I have a "plug and play" Core35 SWG coming from Discount Salt Pool. If I follow various TFP forum members' "fail safe" recommendations and plug it into a 120V timer that only powers-up the Core35 during periods when my pump timer runs the pump, will the Core35 remember its settings? I assume...
  30. calinb

    Spa Borate "Aeromatherepy" Stings Eyes?

    Years ago, I never had this problem but your suggestion is working for me. Thanks!