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Thread: very slight algae

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    very slight algae

    Last week I notices a very slight bit of algae on sides and bottom of pool...only noticed it while brushing the pool. I had about made up my mind at this time to stop going to the pool store and I found your website.

    I used my last pool store water test (day I found algae) and calculated my shock level and used pool calculator and added the appropriate amount of bleach and then promptly ordered a TF-100 kit. Since I did not have anything to test with to keep the chlorine at shock levels, I just added a little each day to keep the algae from taking over until my test kit arrived.

    The kit arrived late yesterday, so this morning I started working on a plan. First....visually my water is clear as can be and most all visible algae is gone....I only see a slight cloud of green when i brush the bottom.

    Here are my test results from this morning: First let me say I have a SWG, 10,000 gunite pool with a cartridge filter.

    FC -25
    CC-0
    CYA- 80
    PH-7.8
    TA- well...that reads almost 200 but i thinkg that is because of the high FC

    Does the 0 CC mean i have gotten rid of algae? What should my next step be? the OCLT? tonight?

    Thank you for any an all help.

    Lisa
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

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    JasonLion's Avatar
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    Re: very slight algae

    0 CC doesn't really tell you much. It is quite possible to have algae with CC at zero the while time.

    The next step is an overnight FC loss test.

    I'm a little concerned about the PH reading 7.8. Very high FC levels tend to make the PH read way higher than it actually is, so your actual PH might be quite low. The next time FC is below 15 test the PH again and adjust as needed.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: very slight algae

    Ph was also 7.8 on last reading from pool store prior to raising free chlorine...at that time I added muratic acid to lower ph to about 7.2 before I added bleach.

    Thanks
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

  4. Back To Top    #4
    Richard320's Avatar
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    Re: very slight algae

    Quote Originally Posted by Lisaheidinger
    Last week I notices a very slight bit of algae on sides and bottom of pool...only noticed it while brushing the pool. I had about made up my mind at this time to stop going to the pool store and I found your website.

    I used my last pool store water test (day I found algae) and calculated my shock level and used pool calculator and added the appropriate amount of bleach and then promptly ordered a TF-100 kit.



    Since I did not have anything to test with to keep the chlorine at shock levels, I just added a little each day to keep the algae from taking over until my test kit arrived.

    The kit arrived late yesterday, so this morning I started working on a plan. First....visually my water is clear as can be and most all visible algae is gone....I only see a slight cloud of green when i brush the bottom.
    Not done yet. When it's no longer green, then worry about the OCLT.


    Here are my test results from this morning: First let me say I have a SWG, 10,000 gunite pool with a cartridge filter.

    FC -25
    CC-0
    CYA- 80
    PH-7.8
    TA- well...that reads almost 200 but i thinkg that is because of the high FC

    Does the 0 CC mean i have gotten rid of algae? What should my next step be? the OCLT? tonight?

    Thank you for any an all help.

    Lisa
    Open a can of POP. That's Pool Owner Patience. A couple more days and it will be clearer than ever and you'll have the testing down pat and everything will be balanced. But get rid of the green first! Also, don't forget to brush hard-to reach areas like under ladder rungs and inside the skimmer.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: very slight algae

    Thanks for the encouragement.....I've got patience but husband does not...after a day of spreading mulch ( our house needs 36 cubic yards of it) he wants to get in his pool!
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

  6. Back To Top    #6

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    Re: very slight algae

    Well my test results were not what i expected or hoped for this morning.

    After keeping the FC at required shock levels all day and brushing often by the end of the day the pool was clear with no more "green cloud" when I brushed. It was not hard to keep at shock levels , I thought because of the cloudy day and because I was beating the algae.

    At bedtime I recorded
    FC- 31
    CC-0

    This morning at 7am

    FC-22
    CC-0

    Now here is my question: when I read pool school and the shock process I completely understood the need to add Bleach to quickly raise my FC levels and not use my SWG to try and do it. However, it never said to turn it off and it never occurred to me to turn it off. Maybe that is why is was so easy to keep the FC at shock levels because my SWG was also still producing chlorine. When I did my last test of the night, I all of a sudden thought that I need to turn the SWG off or my OCLT reading will not be correct.

    So....did I screw up my numbers?

    If not....then where is the Algae hiding because it looks beautiful.

    I will stay the course today.......
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

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    bobodaclown's Avatar
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    Re: very slight algae

    It's still there, the chlorine is killing it, microscopic stuff it is. You running your filter 24/7?
    The chlorine kills the nasties (algae), then the filter collects the dead buggers.
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    Richard320's Avatar
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    Re: very slight algae

    Leaving the SWG on messed up the OCLT, but it didn't hurt the shock process any.

    My guess is you'll pass it tonight if you stay the course. There's no stairs or ladders algae may be hiding in?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: very slight algae

    There is nothing hiding....steps are built into pool and I have no ladders or anything else...just smooth rounded edges that i have brushed very thoroughly.

    I have raised the chlorine back up this morning....brushed again and still see no green . Should I leave the SWG turned off today?

    Also, I'm concered that I may have screwed up my "drop" size.

    On the reading late last night I held the bottle horizontal and let drops fall.......then during my continued education ( I kept reading posts and pool school all day) I learned I should hold bottle vertical and lets drops hang from nozzle. That is how i did it this morning....along with sleepy eyes and not contacts! Maybe my drops this morning were larger? so it took less drops?


    Will keep FC at shock level today and then try and do a uniform OCLT test tonight/tomorrow.

    Thanks
    Lisa
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

  10. Back To Top    #10
    Richard320's Avatar
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    Re: very slight algae

    You can leave the SWG on today. It will help keep the FC up between your jug-dumpings. Just shut it off during the overnight test so it doesn't affect the results.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    SkyKid's Avatar
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    Re: very slight algae

    Quote Originally Posted by Richard320
    There's no stairs or ladders algae may be hiding in?
    Thanks for the suggestion I just removed my ladder and found green stuff inside the rubber bumper caps
    14600gal, In-Ground Fiberglass, Haywood s244t Sand Filter, Jandy Apure35 SWG,
    Haywood 2 speed 1hp pump, Haywood Pool Shark, TF-100 Test Kit http://tftestkits.net/
    Pool School http://www.troublefreepool.com/categ...etting_started
    Never been Pool Stored Thanks to TFP

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    Re: very slight algae

    Ok... Now I think I did do the OCLT test correctly...SWG ran during the day helping me keep FC at shock levels.....then at bed time I turned it off and left it off for the night and did my final test. in the morning my test showed a 9ppm drop.

    for reference can you tell me how to interpret this? since water is clear with no visible algae I expected ( hoped for) no drop , or at least a much smaller drop by now but again.....I have no previous experience by which to compare.

    Continuing with process today...will repeat OCLT test tonight....again water today is partly clean with no algae visible while brushing...also cleaned cartridge filter real well.

    Any advice about properly keeping drops the same size?

    Thanks

    al
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

  13. Back To Top    #13
    bobodaclown's Avatar
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    Re: very slight algae

    Hold bottle vertical. You can wipe the dropper occasionally if needed. That's pretty much it. Are you using the 10 mark or 25 mark. You really only need to use the 10 mark (.5 accuracy vice .2). It saves regent and is accurate enough.

    Have you seen the YouTube videos provided fromTF-100 Test Kits.
    https://www.youtube.com/user/TF100TestKit
    or just the FAS/DPD Test
    https://www.youtube.com/watch?v=PHQG4tg ... 4D&index=1
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    Re: very slight algae

    Thank you for the video link...I will watch it. since I'm needing to keep my FC at 30 ppm for shocking...is there a procedure to use less regent? 60 drops each time to be sure I'm keeping at shock level is using up a lot of regent.

    Lisa
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

  15. Back To Top    #15
    frustratedpoolmom's Avatar
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    Re: very slight algae

    On an unrelated side note - you mentioned the TA at 200 and wondered if that was due to high FC - no its independent of the FC levels that won't affect your result. High TA is something you can deal with later - nothing major now. First past the OFCLT. Then you can address the TA.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Re: very slight algae

    I'm sure the 200 number is due to my inexperienced testing as it was only 120 at last pool store test a week ago.
    Lisa
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

  17. Back To Top    #17
    linen's Avatar
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    Re: very slight algae

    Don't trust the pool store over you TA measurement...I trust yours more. Your TA is high but that can be dealt with later.

    The shocking process is what you need to do now. With your significant OCLT drops, you still have some killing to do. Keep it up, hopefully your OCLT will lower soon.

    Quote Originally Posted by Lisaheidinger
    since I'm needing to keep my FC at 30 ppm for shocking...is there a procedure to use less regent? 60 drops each time to be sure I'm keeping at shock level is using up a lot of regent.
    This is not good for the OCLT test, but for testing during the day to know how much chlorine to add, you can go with a 5 ml sample and use 1 level scoop of the powder, then each drop will be 1 ppm.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  18. Back To Top    #18

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    Re: very slight algae

    I still did not pass the OCLT test this morning.

    I kept FC close to 30 again all day...I tested at 4 pm using only 5 ml drops x1 and it was still good so I added nothing and went to a previously planned event. I got home later than expected any my timer had turned off the pump at 7pm ( I wasn't there to turn it back on). When I came home at 9:30 I turned it back on and let it run for an hour then did a 10 ml FSL/DPD test and it was down by 5ppm again! It was too late to add more and do another test ....this morning it registered another 2.5 drop.

    I'm really questioning my chemistry ability......

    Since pool looks great could there still be algae in my cartridge filter? I've been
    Hosing it off regularly should I be doing something more? Searched forums looking on alive about properly cleaning these but I didn't find anything.
    Thanks

    Lisa

    My family thinks I'm crazy because pool looks great..we have guest coming and I need time for chlorine to drop to swim able levels so I need to figure this out?
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

  19. Back To Top    #19
    frustratedpoolmom's Avatar
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    Re: very slight algae

    Its safe to swim up to shock levels. You can let your guest swim and just shock at night. Algae is probably not surviving on the cartridge. Do you have any lights? sometimes algae can hide in the niches.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  20. Back To Top    #20

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    Re: very slight algae

    I'm not comfortable having my guest swimm at 30 ppm....ruins swim suits, horrible for hair not good for baby skin. I will need to stop adding chlorine soon to be sure it's down before they come this week.


    I have one light in pool and one in spa...I've brushed around them and the stainless ring around each light but I have not taken anything apart...should I?
    15,000gal. Free form aggregate finish with raised spa with spillover to pool
    Sta-right Posi-clear 95sq.ft. Cartridge filter
    2hp whisper flow pump
    Pool pilot nano SWG
    Aqua therm heat pump

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