Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 17 of 17

Thread: New Member Needs Help With Algae

  1. Back To Top    #1

    Join Date
    Jul 2016
    Location
    Mebane/NC
    Posts
    23

    Question New Member Needs Help With Algae

    Hi All,

    I've been reading over this site and decided to join. Hopefully I'm on the right track with my signature and other info. So we've been in this house for about two years and I've never had any issues with algae. Starting about 3 weeks ago, algae started appearing every 4-5 days and has become worse since. At this point, algae now appears every morning when I go check the pool. The water is very clear but I can see the green algae spots on the floor and walls. I've been brushing and vacuuming to waste but nothing seems to be stopping it.

    As far as chemicals go, I currently use 3" tablets, Chlor-Brite and Soda Ash. The tablets are nice to use due to frequently being gone, but after reading this site I'm going to attempt to switch to liquid chlorine. The tablets are put into a floater. When algae is present I shock the pool with Chlor-Brite. I balance the PH using the Soda Ash. I've also tried algaecide from Leslies with no luck. Now for the important stuff. Here's my test results:

    Last night at 11:00 PM:

    FC: 5
    TC: 5
    CC: 0
    PH: 7.2
    TA: 120

    This morning at 10:00 AM (Algae visible again):

    FC: 5
    TC: 5
    CC: 0
    PH: 7.2
    TA: 120

    Unfortunately this is all my Leslie's test kit shows. After reading some pages on this site I've gone ahead and ordered a TF-100 and it should be in soon. I've taken the ladders and steps out of the pool and now have the pump running 100% for 24 hours to see if the algae returns in the morning. Can you all think of anything else I can try to prevent algae from appearing? Thanks in advance for your help. Now I'm off to search for liquid chlorine again since I didn't find any earlier today.

    Darren
    32 X16 Vinyl 20,000 gallon in-ground, Hayward S244T2 Sand Filter, Ecotech EZ Variable Speed 1.5 hp pump motor. TF-100 test kit.

    https://www.mebanepressurewashing.com

  2. Back To Top    #2

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: New Member Needs Help With Algae

    With your size pool, add a jug of 8.25% bleach (or 3/4 gallon liquid chlorine, same chemical), every day until your kit arrives. Your pH is perfect for your upcoming SLAM.

    Have you looked at the PoolMath tutorial? Here: Pool School - PoolMath

  3. Back To Top    #3
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,499

    Re: New Member Needs Help With Algae

    Well, until you get the TF-100 we are kind of at a stand still because we don't know what your CYA level is. The pool industry refuses to recognize the connection between CYA/Stabilizer and the ability of chlorine to do it's thing sanitizing the water. others here can give you the scientific details if you want, but lets just say CYA locks the ability of chlorine to sanitize. The more CYA you have the more chlorine you need to keep in the pool to keep algae at bay. I took over my pool with a CYA of about 250 (CYA tests above 100 are just a guess, not very specific contrary to what the pool store says). With a CYA of 250 I had to keep my chlorine level at around 20 just to keep algae away. Those "easy" 3" pucks are almost half CYA so your level has been rising as long as you have been using them.

    The "Chlor-Brite" seems to be standard 10% chlorinating liquid with a fancy label and ha high price. Most of us around here just use generic liquid bleach from WalMart. A 121oz bottle at 8.25% runs about $2.57 in my area.

    Your pH is being pushed down because of the puck usage also. Trichlor pucks are extremely acidic so that is why you are constantly needing to add soda ash. Plus, if you need to raise pH, borax is usually the best choice. Borax raises the PH and also raises the TA level just a little. The soda ash raises both the pH & TA. Your TA is a littl eon the high side as most of us find the pH more stable with the TA under 100.

    How much Pool School have you read? Start with these:
    ABCs of Water Chemistry
    Recommended Pool Chemicals
    How to Chlorinate Your Pool

    So, welcome to TFP!!
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  4. Back To Top    #4

    Join Date
    Jul 2016
    Location
    Mebane/NC
    Posts
    23

    Re: New Member Needs Help With Algae

    Thanks guys. I'm reading through the links and getting familiar with all the processes. I'll pick up some bleach at Walmart tomorrow (it's $2.57 here in NC too) and hopefully my TF-100 will be in by the end of the week. Based on the phone number on the TFTestkits.net page, I'm hoping the shipping is pretty quick since it's in NC (though I don't know where it ships from). I'll update my test results once the kit arrives.
    32 X16 Vinyl 20,000 gallon in-ground, Hayward S244T2 Sand Filter, Ecotech EZ Variable Speed 1.5 hp pump motor. TF-100 test kit.

    https://www.mebanepressurewashing.com

  5. Back To Top    #5

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: New Member Needs Help With Algae

    Great! In the meantime, also take the floater out. No sense in adding more CYA until you know where you are.

  6. Back To Top    #6

    Join Date
    Jul 2016
    Location
    Mebane/NC
    Posts
    23

    Re: New Member Needs Help With Algae

    Just got my TF-100 and here's my results:

    FC: 18
    TC: 19
    CC: 1
    PH: 7.2
    TA: 170
    CYA: 100

    I did the CYA and TA test twice just to make sure but got the same result both times. Is there an economical option to try to get my CYA down other than a water change? Paying for water here is pretty expensive. Thanks in advance.
    32 X16 Vinyl 20,000 gallon in-ground, Hayward S244T2 Sand Filter, Ecotech EZ Variable Speed 1.5 hp pump motor. TF-100 test kit.

    https://www.mebanepressurewashing.com

  7. Back To Top    #7

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: New Member Needs Help With Algae

    Reverse osmosis is the only other option. Try the diluted test (item 9) to see if you can get a better read on the CYA.
    Pool School - CYA

  8. Back To Top    #8

    Join Date
    Jul 2016
    Location
    Mebane/NC
    Posts
    23

    Re: New Member Needs Help With Algae

    Well I just tried that and got the same result. The black dot is completely gone well before the water line even gets to 100. I tried the diluted test but got nearly the same reading. The water did rush out of the faucet and caused a little bit of the water to splash out of the bottle. I'm getting tired so I'll probably wait until early morning to check it again so I have a fresh set of eyes. Thanks for the link. If anything drastically changes with my results I'll post an update in the morning.
    32 X16 Vinyl 20,000 gallon in-ground, Hayward S244T2 Sand Filter, Ecotech EZ Variable Speed 1.5 hp pump motor. TF-100 test kit.

    https://www.mebanepressurewashing.com

  9. Back To Top    #9

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: New Member Needs Help With Algae

    K. How expensive is your water there? If your CYA is over 200, it's not a happy thing...

  10. Back To Top    #10

    Join Date
    Jul 2016
    Location
    Mebane/NC
    Posts
    23

    Re: New Member Needs Help With Algae

    Last time I checked a water truck is $1000 per load. I pay for water service at the house but I have no idea what they would charge me for using that amount of water. I noticed PoolMath says I need a 60% water change so I'll need to pay for a lot of water. I don't know anything about Reverse Osmosis but I'm guessing that's a filter system that needs to be added to my equipment?
    32 X16 Vinyl 20,000 gallon in-ground, Hayward S244T2 Sand Filter, Ecotech EZ Variable Speed 1.5 hp pump motor. TF-100 test kit.

    https://www.mebanepressurewashing.com

  11. Back To Top    #11

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: New Member Needs Help With Algae

    No, it's a service that comes out, however, I thought you were in NV, and not NC. It is probably not available by you. Sorry.

  12. Back To Top    #12

    Join Date
    Jul 2016
    Location
    Mebane/NC
    Posts
    23

    Re: New Member Needs Help With Algae

    Ok, since I'm new to this and trying to educate myself on CYA, is my high CYA reducing the effectiveness of the chlorine which is causing the algae growth? I thought my chlorine readings would be lower with a high CYA. Or, does the test kit still show high chlorine but it's just not "as effective" as it would be with lower CYA?

  13. Back To Top    #13

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: New Member Needs Help With Algae


  14. Back To Top    #14
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,499

    Re: New Member Needs Help With Algae

    Quote Originally Posted by RoaringRam View Post
    Ok, since I'm new to this and trying to educate myself on CYA, is my high CYA reducing the effectiveness of the chlorine which is causing the algae growth? I thought my chlorine readings would be lower with a high CYA. Or, does the test kit still show high chlorine but it's just not "as effective" as it would be with lower CYA?
    Correct, the high CYA makes the FC less effective. The FC still shows up on the test.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  15. Back To Top    #15

    Join Date
    Jul 2016
    Location
    Mebane/NC
    Posts
    23

    Re: New Member Needs Help With Algae

    Yep I've read them. Based on that info, it seems the test kits will still show "x amount" of FC but it won't be as effective as FC with a lower CYA. One last question: Will doing partial water changes over time help lower the CYA or does it all need to be done at once? I'm just trying to spread out the cost of replacing the water if I can. Thanks.
    32 X16 Vinyl 20,000 gallon in-ground, Hayward S244T2 Sand Filter, Ecotech EZ Variable Speed 1.5 hp pump motor. TF-100 test kit.

    https://www.mebanepressurewashing.com

  16. Back To Top    #16
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,499

    Re: New Member Needs Help With Algae

    Quote Originally Posted by RoaringRam View Post
    Yep I've read them. Based on that info, it seems the test kits will still show "x amount" of FC but it won't be as effective as FC with a lower CYA. One last question: Will doing partial water changes over time help lower the CYA or does it all need to be done at once? I'm just trying to spread out the cost of replacing the water if I can. Thanks.
    Yes it will, but......

    5 - 20% drain & fills replace less water than one 100% drain & fill

    The problem you have is algae in the pool now. The high CYA will make it difficult/impossible to eradicate.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  17. Back To Top    #17
    JesseSchmidt's Avatar
    Join Date
    Jun 2015
    Location
    Fairfield Twp, OH
    Posts
    206

    Re: New Member Needs Help With Algae

    Do you have city water? Cistern? Well? If city, call the water company and ask about filling a pool, they may not charge sewage on X amount of water if you tell them what you are using it for.

    Edit: I just looked it up and our water company actually has "summer water usage" setup to automatically compare your summer usage to your average winter usage and assumes the extra is for watering the lawn/garden or the pool and deducts that amount from the sewage. So you just pay for the water. Not bad!
    26k Gal IG vinyl, Hayward Super 1HP, Hayward Pro Series S244T Sand Filter, TFTestkits TF-100 w/ Speedstir
    Links: TFPC for Beginners / ABCs of Pool Water Chemistry / GETTING STARTED / PoolMath / SLAM / TFTestkits / Chlorine/CYA Chart

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •