Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Local acid wash - how to?

  1. Back To Top    #1

    Join Date
    Jul 2010
    Location
    Philadelphia
    Posts
    134

    Local acid wash - how to?

    So, all season I was never able to budge a ring of scale from my pool left over from the previous winter (Scaling - does it help to add additional chemicals beyond controlling chemistry?).

    I have drained the pool below the ring for the winter closing. I thought of taking a sponge and wiping Muriatic acid over the ring to remove it. Is this something that I would need to leave on, just swipe and rinse .... - anyone know?

    Thanks!
    19000 gal in ground, pebble tec. Sta-rite system 3 DE filter, Aquarite SWG, raypak 406A heater

  2. Back To Top    #2

    Join Date
    Sep 2013
    Location
    Charleston, SC
    Posts
    535

    Re: Local acid wash - how to?

    5900 G Fiberglass IG pool (circa 1990), SWG Hayward Aqua Rite GoldLine (2013), IntelliFlo Variable Speed Pump (2013), Hayward Pro Sand Filter (circa 1990), Well water (no iron or other metals fortunately), test with Taylor K2006C, Charleston, SC

  3. Back To Top    #3

    Join Date
    Jul 2010
    Location
    Philadelphia
    Posts
    134

    Re: Local acid wash - how to?

    Quote Originally Posted by otter86753 View Post
    Thanks for the bump - things maybe get quiet in the off season
    19000 gal in ground, pebble tec. Sta-rite system 3 DE filter, Aquarite SWG, raypak 406A heater

  4. Back To Top    #4

    TFP Guide

    chiefwej's Avatar
    Join Date
    Jun 2011
    Location
    Tucson
    Posts
    2,853
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

  5. Back To Top    #5
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,591

    Re: Local acid wash - how to?

    Sounds to me like you need a tile cleaning service. I had bad scale around my pool tile (and spa face) after a winter of not properly managing my pool water. I found a local company that did kierserite blasting (a modified form of soda blasting that uses magnesium sulfate). The service cost ~ $3/linear foot of tile and I only had to drain the water below the tile line (~4"). The guys was done in about an hour and my pool tile looked brand new!

    You might try looking in your local area for someone that performs pool tile cleaning. Chemical removal (acid washing) with a sponge is going to take forever and it will probably be patchy at best. Sometimes old scale can become very resistant to acid as the calcium in the scale can get replaced by magnesium and other materials (like silica sand, etc) and become very hard to remove. So the sponge method might work on some lighter patches of scale, but the thicker ones will need some form of mechanical removal. Pumice stones and scrappers are not the best idea as they can scratch the glaze on tiling. Soda blasting is a better alternative because the hardness of the grit is about the same as the calcium scale but much softer than the tile glaze. So the grit blasting can be optimized to remove scale without doing any damage to your tiles.

    Good luck,
    Matt
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

Posting Permissions

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