Pools, spas & yard

Pool floats and inflatables developing mold or mildew

Mold or mildew on pool floats and inflatables grows from trapped moisture and organic residue, and can usually be cleaned off if caught before it spreads deep into seams.

Difficulty
Easy
Time
20–30 minutes
DIY cost
$5–$15
Pro cost
$0

Symptoms

  • Black or green spots on the float's surface or seams
  • Musty smell from stored inflatables
  • Discoloration that doesn't wipe off easily

Likely causes

  • CommonStoring items while still wetTrapped moisture in folded or stacked storage creates ideal mold conditions.
  • CommonBody oils, sunscreen, and pool chemical residue left on the surfaceOrganic residue combined with moisture accelerates mold growth.
  • PossibleStorage in a dark, humid area like a garage or shedPoor ventilation and humidity encourage mold to develop even on dry-looking items.

What to do

  1. Rinse the float thoroughly with clean water and a mild soap to remove residue before treating mold.
  2. Mix a diluted vinegar solution (roughly one part vinegar to three parts water) and scrub affected areas with a soft brush.
  3. For stubborn mold, a diluted bleach solution can be used on non-fabric vinyl surfaces, followed by a thorough rinse.
  4. Let the item dry completely in the sun, which also helps kill remaining mold spores, before folding or storing it.
  5. Store pool floats and inflatables fully dry in a well-ventilated area rather than a sealed bag while damp.
  6. Discard items with mold that has penetrated deep into seams or is causing the material to weaken, since it may not be fully removable.

Tools and parts

  • Soft brush
  • Mild soap or diluted vinegar/bleach solution
Vinyl cleaner for pool floatsSearch: “vinyl float cleaner mold remover”

When to call a pro

Not typically needed for this cleaning task; replacement is usually the simplest option for heavily molded, inexpensive inflatables.

Safety

Use caution

Never mix bleach and vinegar or ammonia-based cleaners together, since this creates dangerous fumes; use one method at a time in a ventilated area.

Related guides

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