+ Reply to Thread
Results 1 to 2 of 2

Thread: Fiberglass Pool Stains

  1. #1
    Join Date
    Mar 2011
    Location
    San Diego, Ca.
    Posts
    10

    Default Fiberglass Pool Stains

    Hello, I have a customer with a FG pool that has black streaks in both corners of the deep end only. There not very dark and about two feet long. Water is balanced and I do use tabs in the summer and liquid chlorine in the winter. Any ideas? Thanks

  2. #2
    PoolDoc's Avatar
    PoolDoc is offline Administrator Quark Inspector PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars
    Join Date
    Jan 2005
    Location
    Georgia
    Posts
    11,386

    Default Re: Fiberglass Pool Stains

    Black stains like that often result from shocking pools that have high levels of copper. Algicides,Nature2, ionizers, eroding pool heaters are all possible sources.

    Using HEDP + low pH (~7.0) + low chlorine + brushing can sometimes lift the stains. Using polyquat while the chlorine is low can both protect against algae and help filter any metal particles that form. The HEDP breaks down over time; as it breaks down and the chlorine rises, using skimmer tabs when re-chlorinating can help deposit the copper on the filter, instead of the pool.

+ Reply to Thread

Similar Threads

  1. White splotches, spots, and lines (stains/fading?) in 3 year old fiberglass pool
    By viking in forum In-Ground Pool Construction and Repair
    Replies: 25
    Last Post: 07-26-2012, 02:49 PM
  2. Fiberglass Step with Rust Stains
    By Bossone in forum Dealing with Stains & Metals, . . . and 'Minerals' & 'Ions',
    Replies: 7
    Last Post: 07-06-2012, 05:11 PM
  3. brown stains on fiberglass pool
    By PAGUY in forum Dealing with Stains & Metals, . . . and 'Minerals' & 'Ions',
    Replies: 3
    Last Post: 06-27-2011, 07:57 PM
  4. Fiberglass pool stains
    By Pace74 in forum Dealing with Stains & Metals, . . . and 'Minerals' & 'Ions',
    Replies: 2
    Last Post: 10-20-2010, 09:29 AM
  5. Stains in Fiberglass pool
    By BarryY in forum Dealing with Stains & Metals, . . . and 'Minerals' & 'Ions',
    Replies: 22
    Last Post: 05-20-2010, 06:12 PM

Bookmarks

Posting Permissions

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