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    What chemistry before closing inground pool

    Love the SWG! Granted this is my first pool and we added the SWG, so I have nothing else to reference. My Apollo is great. Only small issues like it tends to corrode a bit with the salt. Thanks for the tips. Note I assume I have Borates of 15 and that changes some of the pool math...
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    What chemistry before closing inground pool

    Hi folks: Well my 32,000 gallon Gunite pool is closing tomorrow. Pool store coming out to help (I still am hesitant to do it myself.) I've tried to follow the advice on here on what to do pre closing. My question is around CSI. The info on this site says I should have PH between 7.4 -...
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    Question on CYA and CC

    Hey folks: I'm in my 3rd year with my 40+ year old Gunite Pool and using the TFP Method. Thanks for all the help thus far! Overall, my water is great and pretty balanced, all things considered. I've noticed a couple of things when I test recently that I'm hoping you can help me understand...
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    If all values are in range, why is CSI in the "Corrosive" region?

    Thanks. Right now my PH is 7.4 after adding acid. So I'm at a CSI of -0.62 It will be a while before PH rises again, but CSI should drop as my pool heats up (just turned the heater on.) Do you think it's more important to keep all chemistry values in the target ranges, or is it better to...
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    Poolmath: Different Results in App vs Web

    That did it. I don't typically track borates. But I had 15 loaded in on the web page. And zero on the app. Changing the app to 15 made them match. Many thanks!
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    If all values are in range, why is CSI in the "Corrosive" region?

    Hi folks: I usually try to get my 32,000 gunite pool dialed in right on the recommended values for FC, PH, CH, TA, CYA, etc. I usually keep salt 3000-3200. Basically I try to follow all of the recommendations here: Water Balance for SWGs - Trouble Free Pool So my question is, if I get...
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    Poolmath: Different Results in App vs Web

    TA is 70 on both web and app. I like the idea of the app, but until the results are the same I won't be using it.
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    Poolmath: Different Results in App vs Web

    Hi Folks: I've got a 32,000 gallon gunite pool. Just tried using the new Poolmath App and was surprised to see the amount of acid it is recommending that I add is vastly different than what the web says. I've always used the Website and have been pleased. My PH is current 8.4 (just opened...
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    How to seal / patch cracks in pool deck

    Hi folks: I've got a 40 year old pool. There are a handful of cracks in the pool deck. Some have been there for a while. I see the previous owner of our house patched them with some caulking. Can anyone recommend a good product to caulk / patch cracks in the pool deck? I don't want water...
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    Antifreeze for skimmer basket?

    Hello: I just closed my pool for the second time ever (or rather I had my pool store close it.) It rained a lot the week after closing and now I see there is 1-2" of water in my skimmer basket. I worry this will freeze. Do I have to put anti-freeze in the skimmer? If so, is there a product...
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    CSI when Closing?

    Yes...I haven't measured CYA in a while. I think its likely in the 50-60 range for a gunite pool with SWG. 32,000 gallons
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    CSI when Closing?

    Hi folks: Pool is closing today and I've followed the instructions in the "How To" section. I did a final test this AM. My results are: FC=17 (drifting down from SLAMing 2 days ago) PH = 7.8 CH = 400 TA = 70-75 Borates = 15? (I checked in June and haven't added any) Salt = 3000 Temp = 65...
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    How critical is CSI for an old Gunite pool?

    zero that I can see. But I haven't really checked. Putting the values in today it seems poolmath shows me at -0.41 Still too high but better. Will increase TA tomorrow and that will get it down.
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    How critical is CSI for an old Gunite pool?

    Thanks all. I haven't measure CYA in a while. It was a tad low (60-70) when last I read it in July. All I know is my FC is holding (although also high). Is there a reason I should raise CYA if my FC is holding? I suppose one reason is I could potentially back down on my SWG which right now...
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    How critical is CSI for an old Gunite pool?

    Hi folks: Just wrapping up our second season with the pool in our new home. Its a 40 year old Gunite pool. Overall, this year has been relatively easy. My FC, PH, CH, and TA have been pretty much in range all season with just a few minor corrections here and there. I did a full test of the...
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    Do test kit chemicals go bad?

    Hi folks: Just curious if any of the drop chemicals in the test kits can go bad / expire? Mine are 2 years old (this is their second season) and they still work and change colors, etc, when expected. But the colors aren't as "vivid" as last year, etc. Thoughts? FYI I've got the TF Drop kit.
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    Best practices for measuring CYA?

    I'm running the pump 12 hours a day (8 AM to 8 PM). Last year I was able to keep SWG at 20% and I consistently had FC of 8-9. This year I was at 20% and I'm struggling to keep FC of 4. I upped it to 60% a few days ago and dumped in some older, liquid shock. I didn't read the FC after adding...
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    Best practices for measuring CYA?

    Hi folks: I'm struggling with measuring CYA. I've got the TF Test Kit and am using the squirt bottle into the graduated cylinder until the dot disappears. Yesterday I got 80ish. Today 60ish. Nothing is different. How do you guys ensure consistency? Also are you holding the cylinder from...
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    It's Confirmed...I definitely have a leak in my Gunite pool :(

    Thanks, but I can't not run the pump that long. I've got an SWG and need to keep FC up. I'm going to do some die tests this afternoon and at least check the classic areas: SKimmer, return jets, light fixture.
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    It's Confirmed...I definitely have a leak in my Gunite pool :(

    The pool leaks with the pump on or off. There is no air in the pump basket with the pump on. I do have a few small drips around the DE filter connection but these aren't the primary problem.
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    It's Confirmed...I definitely have a leak in my Gunite pool :(

    My pool guy suspects this area as well. I did look and there isn't a crack per se in the area where the skimmer meets the Gunite...but there is a definite hard joint with a prominent seam that isn't sealed, epoxy, caulked. I'm going to try this first and foremost. But I worry it's the...
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    It's Confirmed...I definitely have a leak in my Gunite pool :(

    Well, I did a bucket test last night on my 40 year old, 32000 gallon Gunite pool. And it failed. Water in bucket essentially didn't move. Water in pool went down about 1/2" and this was with the pump off. So I'm losing water with the pump not running. I've done some research and understand...
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    Concerned I have a leak....

    Thanks all. I'll do the bucket test this evening. I did locate a small leak on the equipment pad. It drips occasionally from the drain valve (think garden hose spigot) one drip every minute or so. And then it seems there is another slow leak around the backflush valve on my DE filter...
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    Concerned I have a leak....

    Hi folks: I'm a second year pool owner having bought a house with a 40 year old gunite pool (32,000 gallons). Overall the pool is in good shape. It looks like it was refinished 5-10 years ago as there are chunks of plaster in the floor drain line (which is a different story.) Anyway, I'm...
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    To add Borates or not?

    I said my water was balanced. Here are latest values: FC = 9 (still burning down from my SLAM) CC = 0 PH=7.5 CH=400 TA=70 CYA = 70 Borates = 15 My borates are low, but they are optional. What is the benefit of adding them? Is there any downside?
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    To add Borates or not?

    Hi folks: I'm pleased to say my water is pretty balanced. I'm pretty much right down the middle of where I should be on the "target values" on my 32,000 gallon Gunite pool. I have a SWG and I'm always fighting with rising PH. My question is should I add Borates? I've read on here it can...
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    Large, black stain on pool floor after opening!

    UPDATE: Stain was organic. Once I slammed and ran my M-500 for 3-4 days it is pretty much gone! Thanks!
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    Large, black stain on pool floor after opening!

    Hi folks: We opened up our pool today. 32K gallon Gunite, inground. I was pleased to see the water was pretty clear when we pulled back the LoopLock cover. Much much much cleaner than the green swamp we had last year when we opened! Overall the pool looks great and I've started my SLAM...
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    Dolphin Supreme M Series Owner’s Club

    Hi folks: I just bought an M500 "without Bluetooth." I guess the store I bought it from had it both with and without. I assume "without" is perhaps the previous year model? The part ID is Maytronics Part # 99991089-US versus the Bluetooth version which is Maytronics Part # 99991089-USBLE...
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    Robot Newbie - What do you recommend?

    Hi folks. Just wanted to give you an update. I'm a proud owner of a Dolphin M-500 "without Bluetooth". It still has the remote control, but just not the Bluetooth capability for use with the app. My wife isn't a big smartphone user so figured she would like the remote control better...