Waterline Build-Up

While the goal of water chemistry is to help maintain crystal clear and blue sparkling water, at times your pool water - its water clarity - will be problematic, to include the presence of a build-up on the waterline (surface) of the pool, which is most often referred to as a waterline build-up (but may also be referred to as a water ring, scumline, or scum ring). Whereas scale is a hardened and white calcium build-up, the waterline build-up is usually brownish-yellowish and soft (and therefore easy to remove).

While there are effective chemicals (an Enzyme) and maintenance procedures that will help prevent a waterline build-up, a waterline build-up is possible - even likely - if conditions are favorable. Relax. A waterline build-up is no big deal to eliminate...and when eliminated, it will allow your sanitizer to work better and it will make your filter operations much more effective.

Within this pool manual, the following information is available about the presence of a build-up on the waterline (surface) of the pool: