Monthly Archives: May 2010

What causes staining or discoloration of the vinyl below the water line?

While all stains are either mineral or organic, the most common cause of staining and discoloration of your liner below the water line is secretions by micro-organisms.  As these micro-organisms feed, they secrete dyes, which can be one of many colors that stain the vinyl.  Although these stains are unsightly, they in no way degrade the performance of the vinyl.  These dyes are compatible with the plasticizers in the vinyl, causing the stains to go all the way through the sheet.  There is no proven method for removing these stains.

There is a common misconception that the microbial resistance additives used in pool liners will kill the micro-organisms in the area adjacent to the liner.  Many people believe that there is a “protective zone” near the liner that will not support life, but this is not the case.  The additive in the vinyl prevents the vinyl from supporting life, but in no way does it prevent life in areas adjacent to the liner.  Extreme care must be taken during installation to insure that there is nothing behind the liner that may become a food source for these organisms.

There have been cases of stains forming in pools soon after the installation of a replacement liner when there was never a problem with the original liner.  Although there is no way that we can say for sure what has happened behind that new liner, it is believed that when the environment behind the liner is exposed to light and oxygen, a “rebirth” of micro-organisms takes place.  If the bottom and sidewalls of the pool are not properly treated, there is a chance that problems may arise.

There can also be changes in the ground water that introduce organisms into an area that had not been previously exposed.  Extended periods of heavy rain will often cause significant changes in the microbiology of the ground water.  Whenever there is a change in the environment around your pool, there is an opportunity for micro-organisms which hitherto were not present to move into the ground water, thereby creating the possibility of staining.

*The information provided comes from a liner manufacturer.

Can you make a liner for my Polynesian low-hung liner pool?

Yes, we make liners for every brand of pool, but with the Polynesian low-hung pool, you have a unique opportunity.  This pool originally had an acrylic pool wall like a spa and a track at the bottom of the wall so the liner could be “hung” 8 inches from the floor.  Seemed like a great idea at the time.  It’s kind of a hybrid of the acrylic wall/concrete floor pools that are still built today.  You get the beauty and durability of an acrylic wall without the maintenance demands of a concrete floor.

Only problem was, it was often difficult to keep the pool from leaking around the liner bead.  They had a system that used silicone caulk in the bead track and a special 3M brand tape to try and seal it off, but it often proved impossible to stop the leaks.  Today, we still make low-hung style liners, but many people take the opportunity to convert these pools to traditional liners that snap into a track at the top of the wall.

This is definitely a project for an experienced pool contractor.  You add a side mount bead receiver to the top of the wall.  The skimmer and lights usually already have vinyl liner style face plates anyway.  There are a few challenges to converting the returns and perhaps steps to receive a liner, but it’s very doable and suddenly your liner snaps in up top like every other pool out there.  Don’t miss this opportunity.

Behnke Lyons 001

 Behnke Lyons 010


Behnke Lyons 005

* The pool shown was installed by Ebeling Pools in Hutchinson, KS. 

* Pattern shown is Morrison.

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