What you're looking at
| What you see | What it usually is | Fixable without replaster? |
|---|---|---|
| Brown / green / blue-gray stains | Metal stains (iron, copper) from fill water or chemistry | Usually yes — stain treatment + chemistry |
| Leaf-shaped or dark blotchy stains | Organic staining | Usually yes |
| Sandpaper-rough surface | Etching from low pH / aggressive water | Early: balance water. Advanced: resurface |
| White crusty buildup at tile line | Calcium scale from high pH / hardness | Yes — descale, correct chemistry |
| Gray patches showing under white | Plaster worn thin, aggregate showing | No — end of life, plan replaster |
| Sheets or chips popping off the shell | Delamination (plaster separating from gunite) | No — replaster needed |
How long finishes actually last here
- White marcite (standard plaster): ~7–12 years in SW Florida.
- Quartz finish: ~10–15 years.
- Pebble finish (PebbleTec and similar): ~15–20+ years.
Florida pushes finishes toward the low end: 12-month use, intense sun, and — the big one — salt-chlorinated water, which is less forgiving of chemistry swings. Water balance is the single biggest factor. A pool run with chronically low pH will etch a brand-new finish years early; a well-maintained pebble finish can outlast its estimate.
Before you pay for a replaster
- Get the water tested and corrected first. Many "bad plaster" complaints are stains or scale that clear up with chemistry — no resurfacing needed.
- Spot-test a stain: a pro can dab ascorbic acid (metal) or chlorine (organic) on a stain to see if it lifts. If it lifts, it's treatable; if not, it's in the finish.
- Feel the surface. Cosmetic discoloration on a smooth surface can wait. Rough that snags skin plus visible aggregate means the finish is near done.
- Look for delamination. Tap suspect areas — a hollow sound or lifting chips means it's separating and you're on borrowed time.
Resurfacing costs: real numbers (2026, SW Florida)
Pricing is mostly driven by finish type and pool size (these assume an average ~400–600 sq ft residential pool):
- Stain treatment / chemistry correction: $150–$400 — if that's all it needs.
- White marcite replaster: roughly $5,000–$8,000.
- Quartz finish: roughly $6,500–$10,000.
- Pebble finish: roughly $9,000–$14,000+.
- Add-ons often bundled: new waterline tile ($1,500–$4,000) and drain/fitting updates — cheaper to do during a replaster than separately.
The call: if you're replastering anyway, paying up for quartz or pebble usually beats marcite on cost-per-year given how much longer they last in our climate.
Want a local pro to assess it?
A 10-minute look tells you whether you need a $300 stain treatment or a replaster — before you commit to either. Tell us what you're seeing and a licensed North Port pool pro can take a look.