Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: Greenish Tint Backwash Brown with Brown Stains on Steps

  1. Back To Top    #1

    Greenish Tint Backwash Brown with Brown Stains on Steps

    I have a 30,000 Gal. Liner pool. I opened a swamp 4 weeks ago. Shocked the pool to kill algee. The water cleared in about a week yet it was not holding chlorine. So I found this site and saw my CYA was real high. I did several partial drain and fills getting the CYA down to 78ppm. Shocked with 3 96oz containers of walmart bleach. That made the water greenish yet clear along with some brown stains. I then went to walmart since I do not live near a pool store and I wanted this cleared up quickly. (HA HA) I purchased 3 qts of Aquachem Scale Metal & Stain Control added to the pool and it cleared up the next day. Well three days later the same problem this time the stains seem worse. Took a sample to the pool store and spent $70.00 on Phosphate Remover they said my Phosphates were 1000 ppb. Added phosphate remover that made the pool cloudy and did not clear up my problem. I noticed my Calcium Hardness was low so I added Calcium Chloride. The next day water looked clearer with brown residue on the bottom and staining slightly clear. So I vacuumed the brown residue to waste and backwashed the sand filter (very brown water came out). So today I woke up and again brown residue on bottom and backwashed, not as brown. Water still has a greenish tint.

    The pool store said no metal in water. I tested stain on steps with Vit. C and it took the stain away. Left a 3" tablet sit on steps for 24 hrs no change.

    PH 7.3
    ALK 80
    CL holding at 3.0
    al Hardness 110

  2. Back To Top    #2
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: Greenish Tint Backwash Brown with Brown Stains on Steps

    Welcome to tfp, dmatullos

    Quote Originally Posted by dmatullos
    The pool store said no metal in water. I tested stain on steps with Vit. C and it took the stain away.
    I think you are suggesting/know this already...pool store wrong again

    If you haven't, read: http://www.troublefreepool.com/pool-...metal%20stains

    As you now know, pool store testing is unreliable. Time to get yourself and appropriate test kit, see the link in my sig. I like the TF-100.
    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.

Posting Permissions

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