Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 18 of 18

Thread: Algae help

  1. Back To Top    #1

    Join Date
    Mar 2012
    Location
    Australia
    Posts
    18

    Algae help

    I'm kinda new to looking after my pool, and have a few questions, and advice if possible.

    I have a salt water pool, got the water tested and all is good, except I've been having alot of algae problems that never seems to go away. It's pretty bad on the bottom and sides, with some black spots too.

    From adding super chlorinate, and algae liquid, the pool turned a more cloudy aqua and so after a day I started to brush the pool. From doing this, the water got extremely cloudy and the bottom wasn't visible anymore which had a more dark green colour. This is basically a cycle that never ends.

    Considering I have a salt pool, isn't chlorine not recommended by much usage regarding algae control? Also, I've read you should vacuum through the waste and not the filter... How does that work? I usually vacuum, then backwash, rinse, then back to filter.

    Sorry for the basic naive questions

    Cheers,

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,089

    Re: Algaeee help

    Welcome to TFP!

    To help you, we're going to need test results. Chlorine levels and CYA (stabilizer) for sure.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,342

    Re: Algaeee help

    As John T said, we need test results and it would help if you'd tell us what equipment you have.

    A salt pool is a chlorine pool so adding bleach (liquid chlorine) is fine but without test results you're adding blind and will most likely never get your problem solved.

    The good news is now that you've found this place you can read and learn how to maintain your pool properly once you get the algae killed and you won't have a roller coaster with the algae.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  4. Back To Top    #4

    Join Date
    Mar 2012
    Location
    Australia
    Posts
    18

    Re: Algaeee help

    Cheers I'll be sure to check the site/forums thoroughly to learn more about how to maintain pools. Once I have the results, I'll post it up (which reminds me I should perhaps get my own test kit)

  5. Back To Top    #5
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,342

    Re: Algaeee help

    There have been a few posts lately on where to get stuff in your part of the world. You can search and find some suggestions if you don't already have a source.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  6. Back To Top    #6

    Join Date
    Mar 2012
    Location
    Australia
    Posts
    18

    Re: Algaeee help

    I've got the results: (Doesn't look pretty)

    Free Chlorine: 0.5
    pH: 7.8
    Stabiliser: 0

    I've been instructed to add Chlorine, Acid and Algaecide, and to return once water is clear for testing.

    It states when algae settles, vacuum to waste and pool must be full.
    Firstly, what exactly does vacuum to waste mean? - as I always vacuum to filter then back wash/rinse. Also, it says to fill up pool, but wouldn't that mean the filter won't flow? *sighs* Sorry guys, still learning here

    Cheers.

  7. Back To Top    #7
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,089

    Re: Algae help

    Your basic problem is lack of CYA. Your SWCG can't keep up with the demand for chlorine because the sun is consuming all of your chlorine.

    These three topics will help you get over the current problems with algae:

    Defeating Algae

    Turning Your Green Swamp Back into a Sparkling Oasis

    Shocking Your Pool

    To really fix the problem, you need to get your some CYA into the water to allow your system to maintain proper chlorine levels. It takes a while to completely dissolve, so it will be a few days before it is effective.

    You can use the Pool Calculator
    to figure up how much acid and stabilizer you need. You'll need to check with your SWCG manufacturer to find out what the recommended CYA level is for your generator.

    When you vacuum to waste, you bypass the filter and pump water from the vacuum out of the pool. If your pool is really dirty, that will avoid frequent stops to clean your filter. It does use a lot of water though, so it's best to raise the level before you start. The only effect a high water level will have is to reduce the effectiveness of your skimmer in removing debris.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  8. Back To Top    #8
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,342

    Re: Algae help

    Just a note, I never vacuum to waste. That wastes too much water. I always vacuum to filter, then backwash. It winds up using less water that way. Just keep an eye on your filter pressure and when it rises about 10% over clean, backwash it.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  9. Back To Top    #9

    Join Date
    Mar 2012
    Location
    Australia
    Posts
    18

    Re: Algae help

    Thanks guys, much appreciated. Helps a great deal. I'll read the links thoroughly and start getting to it. By the way, us I'm unable to get things rolling untill next week, is it ok to swim in this current condition?

  10. Back To Top    #10
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,342

    Re: Algae help

    Everybody has their own tolerances but I personally wouldn't recommend it. At least until you can get the FC up a bit.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  11. Back To Top    #11

    Join Date
    Mar 2012
    Location
    Australia
    Posts
    18

    Re: Algae help

    Few quick questions:

    I read the 'Shocking' tutorial, and was wondering if it's ok to use Isocyanuric Acid for shock instead of the other suggested CYA acids?

    Also, as I've been running the filter now for 24/7, sometimes it makes a suction noise as I notice the horizontal tube is half full of water. I know I'm doing something wrong...

    One other thing I'm a little concerned about - I always used a soft bristle brush which was pretty useless in the past for algae, but now I'm using an 'Algae Brush' that I recently got which has heavy non-abrasive bristles. It has made a HUGE difference, but this should be ok for my marble sheen pool?

    Cheers.

  12. Back To Top    #12

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,078

    Re: Algae help

    Back to Pool School for you!!

    Cyanuric acid is unrelated to the shock process. You will use it once the process is complete.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  13. Back To Top    #13
    Mod Squad zea3's Avatar
    Join Date
    Jul 2009
    Location
    Houston, Texas
    Posts
    9,198

    Re: Algae help

    We recommend liquid chlorine for the shock process. Even though your pool had 0 CYA, it is best to add CYA separatly so you have control over how much you add to the pool. Bring the CYA up to about 40 ppm, complete the shock process, then add enough CYA to reach 70 ppm total.

    As for the pump and filter, make sure the pump basket stays full of water at all times, and check if the filter needs backwashing. The return flow into the pool should be strong when the filter is clean. If the return flow feels weak it may be time to backwash the filter.
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
    Love TFP? Become a
    TFP Supporter!

  14. Back To Top    #14

    Join Date
    Mar 2012
    Location
    Australia
    Posts
    18

    Re: Algae help

    Oops, had a little mix up there... It's all coming to me now :P

    Ok, my pool has changed dramatically. The algae is pretty much non-existent, and the colour is light blue, although still cloudy where you can't see the bottom at the deep end.

    Although I vacuumed to waste before, I've noticed there's still small algae that keeps returning to the pool from vacuuming normal. Safe to say another vacuum to waste?

    Here's my results updated:

    TC: 10.0
    FC: 10.0
    pH: 7.4
    TA: 110
    CA: 75
    CYA: 0

  15. Back To Top    #15

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,078

    Re: Algae help

    Although I vacuumed to waste before, I've noticed there's still small algae that keeps returning to the pool from vacuuming normal.
    Your filter should be catching any debris. Do you know absolutely that you have debris coming from the returns?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  16. Back To Top    #16

    Join Date
    Mar 2012
    Location
    Australia
    Posts
    18

    Re: Algae help

    Hmm, I've noticed a very small crack in my back filter. Seems that'll be the culprit. I saw a filter net the other day which covers around my filter basket which smaller leaves have still been escaping the filter also. What are those (filter net) called?

  17. Back To Top    #17
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,342

    Re: Algae help

    Can you post a pic of your pool and equip?

    You're most likely talking about skimmer socks but sometimes the dialect differences get us.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  18. Back To Top    #18

    Join Date
    Apr 2009
    Location
    Burlington, ON, Canada
    Posts
    337

    Re: Algae help

    Are you doing anything to increase your CYA level?
    16x28 Roman, 55000 litres, salt water, Zodiac Duoclear 130 (mineral cartridge removed!!!), inground, vinyl liner
    Hayward Tri-star VS900 (1.85 HP) pump, Hayward C3030 cartridge filter
    Nine Techno Solis 4x10 solar panels, Jandy LX 250 natural gas heater
    Jandy Aqualink PDA with Sub Panel Power Centre

Posting Permissions

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