Algae Growing Behind Vinyl Liners

Over the last 12 yrs i have probably looked at over 100 inground vinyl pools with this black mold growth under the liner.

Algae growing behind vinyl liners.

To ensure that the problem is eradicated for good however it may be necessary to. Algae create a chlorine demand in the water for itself consuming chlorine that should be working on other contaminants. As it expels carbon dioxide the ph level of pool water can rise. Once you have the algae removed be sure to maintain the pool at its proper ph and chlorine levels to prevent the algae from coming back.

To prevent this many manufacturers incorporate biocides within the makeup of the vinyl but this isn t always a bulletproof solution. Step 1 scrub the algae with a soft nylon brush. Algae are kind of like weeds in your garden. Here s my recipe for turning around a dark green algae filled vinyl liner pool.

They start as a bacterial colony or can be algae or mineral crystals. We treated it with a super algeacide and ph balance. Stains behind the liner some stains are actually behind the liner in between the wall or floor and the liner. Algae can even grow under vinyl pool liners on the walls or floor beneath the liner.

Clean the pool the first thing that has to be done is to clean the pool to remove as much organic debris as possible. The pool water is clean but the liner is covered it what appears to be brown and red algae. Although vinyl liner pool surfaces are relatively non porous there are sections such as the plastic steps attached to the pool wall and behind light niches that are prone to algae growth. Alot of people initially treat it chemically as a algae growth major shock treatment in addition to a special algaecide.

The red algae seems gone but the brown will not come off even after scrubing with a brush. This is because they re submerged and don t have circulated water. The problem area will lighten up for 3 5 days then come back to its original color size. Treating it as such many technicians drop the ph and super chlorinate the water.

If they do occur however minor problems might be treatable simply by adjusting the ph levels to bring your spa water back to the proper balance then shocking your tub water with sanitizer. This sort of stain often is misdiagnosed as black algae arko says. How to fight hot tub algae mold and mildew. Once the algae has appeared onto a vinyl pool liner it is not hard to get rid of but it is a good indication it is time to check the pool s chemical levels.

Safe for vinyl liners and they work for both mineral and organic pool stains. There s no way the water will come back if you have a layer of leaves on the bottom of the pool or floating around on top.