Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Do I have algae? Should I react today?

  1. Back To Top    #1

    Join Date
    Aug 2012
    Location
    Tecumseh, MI
    Posts
    53

    Do I have algae? Should I react today?

    Here are the cliffnotes...bought the house and moved in a month ago, first time I've had a pool (15x30 oval, 11,000 ish gallons, large cartridge filter). Thing had been crystal clear our entire month (and 3 months before buying/moving).

    Haven't had rain in weeks/all summer up here. Had steady rains Thurs/Friday/into Saturday. Sunday was to be pool cleaning/vacuum day, filter change, etc. Noticed (along with the normal sand debris) on the bottom that there was a yellow-ish powdery substance on the bottom (not on the sides, but around the outside 2-feet of the bottom). Looked kind of like pine tree pollen, but it's really not that time of year (but who knows with the dryness we have had, who knows how dirty that rain was). Things were a little cloudy too. Not knowing if it was aglae or what, we went ahead and brushed the pool down (didn't vacuum) and things REALLY got murky/cloudy.

    Being a newbie, I hadn't got into the BBB method yet but did have 1 1/2 pounds of Cal-Hypo shock, so I shocked the pool sunday evening - didn't see any improvement that night, and really not much Monday and don't see much today either. BUT, I noticed the filter cartridges being dirty after one day. Monday it was like 3/4 covered in a "sea green" / yellowish (dare I say, Dijon mustard yellow) substance, today it was only about 1/2 covered (when I say covered, I mean it had areas that were that color of residue on it, but not what I would call "Build Up" on it).

    Now, yesterday I DID order the TF100, but for now all I have is a 2-test OTO kit, or some strips that I have on hand from the "spring opening" kit I already ordered/recieved.

    Using a little creative engineering, here are the test results I came up with based on what I have on hand:

    FC = btwn 6-8
    CC = btwn 12-15
    TC = 20-ish
    CYA = 80-ish
    pH = 7.2
    TA = 120

    It's been heavy cloudy much of the time since the Sunday shock, sunny for a couple hours late this afternoon is it.

    SO, here is my question...should I:

    A) Assume it is algae and run out right the second and buy 4 gallons of bleach like the pool calculator suggests?
    B) Do NOTHING b/c my creative engineering isn't reliable enough to act on; just be patient for a couple days until my TF100 arrives
    C) DON"T PANIC, b/c there IS still showing to be FC in the pool (according to the unreliable strips), so as long as the FC is there I can/should wait for the TF100 and then do the overnight tests and such.
    D) Something entirely different?

    Thanks for the help!!!
    ~12,500 sqft above ground, 95 sq ft Sta-Rite Posi-Clear Cartridge filter, installed by previous owner in 2010?, Proud TF100 user!

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Do I have algae? Should I react today?

    A) Assume it is algae and run out right the second and buy 4 gallons of bleach like the pool calculator suggests?
    B) Do NOTHING b/c my creative engineering isn't reliable enough to act on; just be patient for a couple days until my TF100 arrives
    C) DON"T PANIC, b/c there IS still showing to be FC in the pool (according to the unreliable strips), so as long as the FC is there I can/should wait for the TF100 and then do the overnight tests and such.
    D) Something entirely different?
    A) It is probably algae and you will need to shock with chlorine but you will need way more than 4 gallons. 4 gallons will get you to shock value but won't keep you there. read "How to Shock Your Pool" up in Pool School.

    B) That's really pretty close. You can put a gallon of bleach in daily until your kit arrives which will keep the algae sort of at bay until you can test properly.

    C) That's pretty close as well....see B) above.

    D) See B) above and be sure to read "The ABC's of Pool Water Chemistry" up in Pool School

    PS - only post once...we'll see it and we'll all help.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Aug 2012
    Location
    Tecumseh, MI
    Posts
    53

    Re: Do I have algae? Should I react today?

    Thanks Dave, wish I would have ordered the kit last week like I should have.
    ~12,500 sqft above ground, 95 sq ft Sta-Rite Posi-Clear Cartridge filter, installed by previous owner in 2010?, Proud TF100 user!

  4. Back To Top    #4

    Join Date
    Apr 2012
    Location
    SW Ohio
    Posts
    456

    Re: Do I have algae? Should I react today?

    well you will have your test real quick, Dave has really Excellent products and super fast shipping.....good luck......Mike
    18x52 intex ultra frame pool 6981 gallons, 1 HP LL pump with 19 in sand filter,BBB method,borax 50ppm
    leslies DPD test kit + fas-dpd chlorine test kit + borates test strips
    thru wall skimmer,hard plumbed with 2 returns 1 1/2 sch 40 pvc
    1 large fountain 1 inch sch 40 pvc,shut off ball valves on all

Posting Permissions

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