Spa liner develops bulges or uneven floor; users feel lumps underfoot.

Safety first: Do not use the spa if the base is unstable or severely uneven; tipping risk exists.

• Drain spa: Drain all water and allow the liner to dry.
• Inspect base: Lift or move the spa to inspect the ground. Remove rocks, sticks, or debris.
• Level surface: Prepare a firm, level base using pavers, a spa pad, or compacted sand with a protective mat.
• Reposition spa: Place the spa back on the improved base and reinflate if needed.
• Refill and check: Refill and verify that the floor feels even and stable.

Warning: Do not place the spa on balconies or decks without confirming load capacity with a structural professional.