Technical Bulletin # 2   TB-2
Subject: Page 2 of 2  
Recommendations for Care of Vinyl Lined Swimming Pools--Continued
 
7. Do not drain the pool completely for any reason without consulting a pool
  professional for advice. The older the liner, the higher the risk that the liner will shrink and not stretch back into it's original shape without ripping. Sites with a high water table may also carry the additional risk of structural damage.
 
8. Never close a pool without circulating the pool water for several hours after
  the final addition of chemicals. Even liquid chlorine can concentrate in the deep end and cause liner bleaching, if not sufficiently blended with the rest of the pool water.
 
9. Use a well fitting winter pool cover that is tightly sealed around the entire
  perimeter of the pool to prevent accumulation of debris such as leaves, worms, etc. during the winter period. Organic matter has the potential to cause staining and/or bleaching of the vinyl liner.
 
10. Avoid the use of any abrasive cleaning agents or cleaning aids (e.g. such as
  steel wool, sharp bristled brushes, scouring pads, etc.).
 
11. Use only manufacturer's recommended vinyl liner cleaner for removing
  accumulated soil at water line or other soiled areas.
 
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