Poolmaster
Poolmaster 54507 Waterfall Fountain
The $26 experiment — dry climates only — A screw-into-your-return waterfall fountain that cools by evaporation using the pump you already run — the honest expectation is a few degrees in dry air and only 1–2°F on a muggy Gulf-coast night
Specs
| Method | Evaporative (return-jet fountain) |
| Cooling power | ~4–5°F in dry climates; ~1–2°F net in humid ones (owner-reported) |
| Humidity-proof | No — pure evaporation; weakest exactly when Florida nights are muggiest |
| Also heats | No |
| Power draw | None beyond the pool pump you already run |
| Typical price | ~$26–31 |
Pros
- Costs less than a pool float and uses no extra electricity — the right first experiment before any four-figure hardware
- Fits most 1.5" threaded return fittings with adjustable spray height and direction
- In dry air it genuinely works: Austin/Phoenix owners report ~4–5°F running through daylight hours
Cons
- Physics caps it in humidity: evaporative cooling can't beat the air's wet-bulb temperature, so muggy Gulf-coast nights yield ~1–2°F net — set expectations accordingly
- Extra evaporation means extra water and a slow pH rise (keep muriatic acid on hand)
- A solid-not-stellar 3.8★ across 1,917 owners — a few complain the spray head pops off; treat it as a cheap experiment, not a precision instrument
✓ Safety: no active recall — No active CPSC recall found (checked Jul 2026).
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Data last verified: Jul 2026. Ratings are real, dated reads — never scraped or invented. Full methodology and monetization disclosure: how we test.