Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: Help Explaining Why SLAMing Is Better Than Algaecide

  1. Back To Top    #1

    Join Date
    May 2015
    Pittsburgh, PA

    Help Explaining Why SLAMing Is Better Than Algaecide

    Hi there,

    I'm new here but have been reading extensively. I've never cared for a pool before, but wanted to help my immediate family this year as the pool we all use is pretty green after opening.

    From what I understand, they're plan is to use a shock and algaecide, but they don't test for CYA or much other than those cheap chlorine and ph tests.

    I tried explaining to them the methods here, but was met with the idea that if we use chlorine we won't be able to swim for weeks while the algaecide will kill it in a couple days. Obviously wrong on several levels, but could someone point me somewhere or help me explain to them why the SLAM method will work better and faster?


  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Franklin, NC

    Re: Help Explaining Why SLAMing Is Better Than Algaecide

    Algecides is more of a preventative rather than a treatment product.

    A SLAM is better, because you are assured that everything in the water is dead. With the normal pool store shock & algecide treatment you will be back in the same boat, it's just a matter of time. We never say a SLAM is quicker, it just might not be. Then going forward maintaining the proper chlorine CYA ratio will assure that nothing comes back. Many people following traditional methods will just continue going through cycles of algae and lots of products being thrown in the pool.

    You can't force people to follow these methods, it just won't work.
    TFP Moderator

    Trouble Free Pool is a free resource. The people who answer questions are volunteers. If you find the site to be a good resource, please consider making a donation to help support the site. Thanks.

    Support the site

  3. Back To Top    #3
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: Help Explaining Why SLAMing Is Better Than Algaecide

    Welcome to TFP!

    Mostly because it works. Algaecide does a decent job of preventing algae, but it isn't much use in killing it. But if somebody doesn't want to hear it there isn't much you can do to convince them. Shock is chlorine, so they are really just randomly adding chlorine with no idea of whether it is too much or not enough. Kind of like shooting in the dark. If you shoot enough, you will hit something, but you waste a lot of bullets.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  4. Back To Top    #4
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Help Explaining Why SLAMing Is Better Than Algaecide

    Welcome to TFP!!

    Algaecide is used to help prevent algae and is no where near as effective at chlorine at killing the algae.

    Honestly, the SLAM may not work faster than blindly dropping a nuke load of chemicals in the water. But the SLAM process will not potentially damage the pool and equipment either.

    Kind of funny that they are worried about a some chlorine in the water, but more than happy to swim in all the other garbage chemicals.

    These might help:
    Defeating Algae
    Turning Your Green Swamp Back into a Sparkling Oasis
    SLAM Process
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  5. Back To Top    #5
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Midland TX

    Re: Help Explaining Why SLAMing Is Better Than Algaecide

    Welcome to TFP

    They are mistaken, badly. Chlorine is approved for drinking fact required by Law, and bleach is acceptable for that purpose. All levels we suggest for pools is safe to swim in, and this is backed by hard science. These folks simply aren't educated on the use of Chlorine.

    We run similar levels in many pools for the same purpose which is to sanitize the pool, along with killing/preventing Algae. One reason Algaecide is not good, because some of it contains copper. That can stain hair, and pools. Plus, most of it is for preventative measures not as a cure when you have it.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  6. Back To Top    #6
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Central Minnesota

    Re: Help Explaining Why SLAMing Is Better Than Algaecide

    There are many "schools" of thought on the function of algaecide and it does depend on which type of algaecide you're referring to. There are the research schools and the pool store schools. Pool store "school" advice is based on selling product, not efficacy.

    Polyquat-60 is the best algaecide for swimming pools. Algaecides that contain metal compounds (most that contain metal are a copper) have side effects that can lead to staining of pool walls and should be avoided in any situation. Algaecide is actually a poor name for the product as yes, they are able to kill algae by disrupting their cell membranes but kill algae at a much slower rate that required by the EPA at their recommended dosages. Algaecide is best when use as an algae preventative when free chlorine levels are below what they normally would be such as during an ascorbic acid treatment to remove metals staining or to prevent winter/closed pool algae growth should the FC level drop while the pool is closed.

    This is a good thread talking about polyquat function and usage if you can delve into the scientific explanations and data:

    In layman's terms, algaecide does not kill algae or bacteria fast enough to be a valid method for eliminating an active algae bloom. Hypochlorite from bleach or powdered sources kills algae AND bacteria very quickly and fast enough as required by the EPA. Powdered forms all have downside of adding CYA, CH or much higher cost than bleach. You can use algaecide in combination with hypochlorite, but it's a waste of money. Algaecide is broken down by high levels of FC that are present when shocking a pool so you're just wasting money by putting both in at the same time.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

Posting Permissions

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