How can you get rid of black fungus -under the vinly liner in an inground swimming pool?
Some types of bacteria and fungus found in the soil can actually penetrate through a vinyl liner and cause stains to appear on the liner. Usually they will start off as spotted or cloud-like formations on the liner. Algaecides used in the pool water have little if any effect on the stains caused from bacteria, since it doesn’t get to the source of the bacteria in the soil. If a pool is known to have a problem with bacteria staining the liner, the ground underneath the liner may be treated with a solution of one half household chlorine bleach and one half water. Mix the bleach in the water and mist the floor of the pool with a small garden sprayer three or four times prior to dropping the new liner in the pool. After the last application of bleach solution, wait several hours before dropping the liner; making sure the solution has been absorbed into the ground.