Our mild winters make a heat pump the efficient choice for most Key West pools, though gas still earns its place for spas and quick warm-ups. When a heater struggles, it is usually flow, chemistry or a tired part rather than the whole unit. These answers cover keeping water comfortable year round.
See pool heater repair →- What Is the Ideal Swimming Pool Temperature? Jun 25, 2026 Most swimmers are comfortable between 78 and 82F. Learn the right target for lap swimming, kids, therapy pools, and why above 90F becomes a problem.
- How Much Does It Cost to Heat a Pool? May 20, 2026 Pool heating cost depends on heater type, target temperature and cover use. Compare heat pump, gas and solar running costs, and how to cut your bill.
- Heat Pump or Gas Pool Heater: Which Is Better? Apr 13, 2026 Heat pumps cost far less to run and suit Florida year round. Gas heats much faster but costs more per hour. Compare speed, running cost and lifespan.
- How Long Does It Take to Heat a Pool? Mar 8, 2026 Gas heaters can warm a pool in hours. Heat pumps usually take a day or more. What determines heating time and how to speed it up without a bigger heater.
- Do Solar Pool Heaters Actually Work? Jan 30, 2026 Solar pool heaters work and cost almost nothing to run, but only produce heat when the sun cooperates. What they deliver, what they need, and their limits.
- Does a Pool Cover Really Keep Heat In? Dec 25, 2025 Yes. A pool cover is the single biggest heat retention measure available because it stops evaporation, the main way an outdoor pool loses heat overnight.
- What Size Pool Heater Do I Need for My Pool? Dec 18, 2025 Pool heaters are sized on surface area, target temperature rise and wind exposure, not gallons alone. How BTU sizing works and why undersizing hurts.
- Why Is My Pool Heater Not Working? Nov 18, 2025 Most pool heater failures trace to water flow, thermostat settings, gas or power supply, or a dirty filter. Check these before calling for service.
- Can You Run a Pool Heater Year Round in Florida? Oct 13, 2025 You can, but most Florida pools do not need it. Summer water often runs hotter than comfortable on its own. When heating pays off and when to shut it off.
- Does Heating a Pool Increase Chemical Use? Sep 6, 2025 Yes. Warmer water accelerates chlorine loss and speeds algae growth, so heated pools need more sanitizer and closer testing. How to manage that demand.
- What Water Temperature Is Too Hot for a Pool? Aug 1, 2025 Above roughly 90F pool water stops being refreshing and can pose health risks. The warning signs, who is most at risk, and how to cool a pool down.