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Thread: Let's do this

  1. Back To Top    #1

    Let's do this

    Hello!

    Closed on my house on the 13th - Thursday, had my TF-100 kit ordered ahead of time. I just did tests this evening.

    CYA 100
    ClBR >10 - it was orange, not yellow
    PH 7.8
    TA 130-140
    CH - Never turned blue - it was just purple the whole time when I added the R-0012.

    Pool has been maintained by a local pool company (once a week), and was last maintained on the 10th. The inspection we had done before purchasing the house said there was mustard algae. The pool looks pretty clear but there is brown powdery stuff on one of the steps.

    It's a 14K gallon gunite pool with cartridge filter. I haven't done anything to it yet (except take a quick swim). I'm thinking I will clean the filters and start draining/filling tomorrow afternoon. As far as I can tell I will have to syphon with a water hose. I guess after I get the CYA down I will shock at the mustard algae shock levels (I've read the pool school stuff).

    Any advice/tips on my readings and anything I should pay special attention to is appreciated.

    Thanks in advance for any advice!
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  2. Back To Top    #2
    Isaac-1's Avatar
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    Re: Let's do this

    Post some photos of the pool and equipment and maybe we can give you ideas
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

  3. Back To Top    #3

    Re: Let's do this

    Thanks! Here are some photos of the equipment and pool. Also a couple of quick things I noticed. The pump is on a timer and has been running ~8 hours per day (late morning - afternoon). Also the auto vacuum runs everyday as well.

    [attachment=2:1mruu3xe]1.JPG[/attachment:1mruu3xe]
    [attachment=1:1mruu3xe]2.JPG[/attachment:1mruu3xe]
    [attachment=0:1mruu3xe]3.JPG[/attachment:1mruu3xe]
    Attached Images Attached Images
    • File Type: jpg 1.JPG (112.5 KB, 193 views)
    • File Type: jpg 2.JPG (119.3 KB, 193 views)
    • File Type: jpg 3.JPG (100.4 KB, 193 views)
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  4. Back To Top    #4

    Re: Let's do this

    A few more

    [attachment=2:30v3ieox]4.JPG[/attachment:30v3ieox]
    [attachment=1:30v3ieox]5.JPG[/attachment:30v3ieox]
    [attachment=0:30v3ieox]6.JPG[/attachment:30v3ieox]
    Attached Images Attached Images
    • File Type: jpg 4.JPG (111.1 KB, 193 views)
    • File Type: jpg 5.JPG (156.9 KB, 193 views)
    • File Type: jpg 6.JPG (117.8 KB, 193 views)
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  5. Back To Top    #5

    Re: Let's do this

    One more

    [attachment=0:2nzunx4y]7.JPG[/attachment:2nzunx4y]
    Attached Images Attached Images
    • File Type: jpg 7.JPG (86.3 KB, 192 views)
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  6. Back To Top    #6

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    duraleigh's Avatar
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    Apr 2007
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    Re: Let's do this

    It seems to me you have a good idea of where you are going and a good grasp of pool water chemistry.

    Your FC is quite high (which you could check even more accurately with the Weekly FAS/DPD test) but it's ok because of your VERY high CYA.

    I see you have a plan to reduce CYA to 50 ppm?? is that the target?

    Disregard TA and CH while you drain/refill to get your CYA manageable.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  7. Back To Top    #7

    Re: Let's do this

    Thanks! Yeah - I was planning on trying to get CYA down to 50. I'm pretty fuzzy on how all of the equipment/timers/etc work, but maybe they are on a good schedule until I figure out what I'm doing.

    So drain/fill, and take readings again afterwards?? Maybe start the shock process Monday/Tuesday depending on when I get the CYA down.


    Thanks!

    BTW - this site is great!
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  8. Back To Top    #8

    Re: Let's do this

    That's a beautiful pool. Congrats!
    20K gal. IG. vinyl. 21" Hayward sand. 3/4 hp

  9. Back To Top    #9

    Re: Let's do this

    Just wanted to give an update and say thanks again!

    Started my drain/refill by syphoning and after a day I could tell that it was going to take a week or more to get it done. Bought a pump from home depot and about 36 hours later I had my CYA down to about 50, maybe a bit higher. Checked my levels with the TF kit, cleaned the filters and started the shock process - I messed up a little and went straight to the mustard algae shock level (just read the instructions in pool school wrong), but the rest of the process seemed to go okay. Finished up the shock process; clear pool, no CC, and no overnight FC drop. Chlorine just made it down to my target level yesterday evening, so this morning I took a full set of readings:

    FC = 7.5
    PH = 8.2
    TA = 190
    CH >350
    CYA = 50-60
    CC = 0

    Pool looks great (see pic)!

    I've been adding muriatic acid a little every day to try to get the PH down, I'm thinking that PH and TA are related and telling me they need to come down, but I haven't been trusting the PH test because of my high FC levels during shock. I've been using muriatic acid that was left from the previous homeowner and haven't seen much movement on those readings. I guess I will just keep at it.

    I set my pump to go about 8 hours per day, and the auto vac to go abut 6... Does that sound about right?

    Any other thoughts/ideas on the PH/TA?

    One other question - the auto vac seems like it wants to float a little, especially when I first put it in the pool. I'm guessing it's got air caught in it somewhere. Any ideas?

    Thanks again all! It's really cool to think that I'll be able to handle the pool with no store, no local training, just by reading the great information on this site!!! I can't say thanks enough!

    [attachment=0:1bw8vp03]Pool.jpg[/attachment:1bw8vp03]
    Attached Images Attached Images
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  10. Back To Top    #10

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    duraleigh's Avatar
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    Re: Let's do this

    Any other thoughts/ideas on the PH/TA?
    Yeah, go ahead and add however much muriatic it takes to get your pH down into the mid 7's. 8.2 is too high and sets you up for some issues. Your TA will come down when you lower pH.

    Nice work on your shock process!!
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  11. Back To Top    #11

    Re: Let's do this

    Looks like an oasis. Fantastic!
    20K gal. IG. vinyl. 21" Hayward sand. 3/4 hp

  12. Back To Top    #12

    Re: Let's do this

    Thanks both. Will work on the TA and PH.
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  13. Back To Top    #13

    Re: Let's do this

    Wasn't sure if I should post to a new thread, but I hit a little bump in the road yesterday. Pool has been clear and the only issue I had seen since May 27 was an occasional brownish dusting on one of the steps. I've been suspicious of mustard algae since I received the inspection report before we bought the house.

    For about 3 days before yesterday, I had stopped doing the chlorine drop test (the more accurate one), and had been using the simple chlorine/ph daily test kit (the blue one). That kit always showed me at 5+ chlorine so I had been gradually reducing the amount of bleach I was adding and I guess I ended up under my target.

    Yesterday afternoon, I did the more sensitive drop test and my FC was 4 (my target is 6 with 50 cya), I also picked up 0.5-1.0 CC and was surprised because it had been at zero.

    A couple of hours later, I noticed the walls were a little darker than normal and started brushing the (brownish) stuff off. It was on all of the walls. I started shocking and hit it hard immediately last night.

    Should I finish up with the mustard algae shock process or should the regular process be okay? I'm kind of surprised I had a bloom while at 4PPM FC.... Maybe 6-7 FC was keeping it down but 4 was too low with my cya levels.....?

    Thanks all!
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  14. Back To Top    #14

    Join Date
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    Re: Let's do this

    Go ahead and do shock process then at mustard levels. Visible algae and cc > .5 means time to shock.

    CYA test accuracy is +- 10 so its possible you're at 60. Letting FC drop to 4 is asking for trouble.

    Trust the fas-dpd test. I test daily with it. How about a full set of results?

    And do keep everything in one thread. Helps preserve the background.
    18x36 inground vinyl lined, Hayward sand filter and tablet chrolinator, approx 18k gallon

  15. Back To Top    #15

    Re: Let's do this

    Thanks Spidey - I was thinking the same thing that my cya may be near 60. I keep thinking that my small water adds from evaporation will eventually bring it down some. (Side note - I've been reading about poly quats and wondering if some weekly maintenance might help until my cya comes down a little more...?)

    Just ran a full set

    FC = 16 now (boosted from 4 to 22 last night, tested at 19 first thing this morning then boosted back up to 22 but didn't test)
    I've been shooting for halfway between the 50-60 CYA chart levels)

    PH = 7.5-7.8 (closer to 7.5)
    TA = 140 (been working on that)
    CH =420
    CYA = 50-60
    CC = 0

    I'm thinking I want to boost to the mustard algae shock level tonight. I'm pretty sure I would pass the drop test in the morning if I didn't do anything. I've been at ~20-22 FC for the better part of 24 hours now....
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  16. Back To Top    #16

    Join Date
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    Re: Let's do this

    FYI. Cya stays in the pool. Any water you add due to evaporation will not affect cya or ch.
    18x36 inground vinyl lined, Hayward sand filter and tablet chrolinator, approx 18k gallon

  17. Back To Top    #17

    Re: Let's do this

    Got it - I was thinking about it wrong. Guess I need to do another partial drain/fill. Thanks!
    14K IG Gunite Pool, Jandy CL460 Cartridge Filter, Jandy 2.0HP Pump, Pentair Booster Pump, Ultrapure UV Ozone Generator

  18. Back To Top    #18

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    chiefwej's Avatar
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    Re: Let's do this

    The only way to lower CYA is to remove some water. Splash out, back washing, partial drain and refill. For a chlorine pool your CYA level is still on the high side. If you drop it to 35 or 40 the pool will be easier to manage.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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